CINXE.COM

Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts | Photosynthesis Research

<!DOCTYPE html> <html lang="en" class="no-js"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="applicable-device" content="pc,mobile"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="robots" content="max-image-preview:large"> <meta name="access" content="No"> <meta name="360-site-verification" content="1268d79b5e96aecf3ff2a7dac04ad990" /> <title>Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts | Photosynthesis Research</title> <meta name="twitter:site" content="@SpringerLink"/> <meta name="twitter:card" content="summary_large_image"/> <meta name="twitter:image:alt" content="Content cover image"/> <meta name="twitter:title" content="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts"/> <meta name="twitter:description" content="Photosynthesis Research - This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most complex membrane..."/> <meta name="twitter:image" content="https://media.springernature.com/full/springer-static/cover-hires/journal/11120"/> <meta name="journal_id" content="11120"/> <meta name="dc.title" content="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts"/> <meta name="dc.source" content="Photosynthesis Research 2004 80:1"/> <meta name="dc.format" content="text/html"/> <meta name="dc.publisher" content="Springer"/> <meta name="dc.type" content="OriginalPaper"/> <meta name="dc.language" content="En"/> <meta name="dc.copyright" content="2004 Kluwer Academic Publishers"/> <meta name="dc.rights" content="2004 Kluwer Academic Publishers"/> <meta name="dc.rightsAgent" content="journalpermissions@springernature.com"/> <meta name="dc.description" content="This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most complex membrane protein for which detailed structural and functional information is now available. This short historical review cannot cover all the work that has been carried out over more than 50 years, nor provide a deep insight into the structure and function of this protein complex. Instead, this review focuses on more personal views of some of the key discoveries, starting in the 1950s with the discovery of the existence of two photoreactions in oxygenic photosynthesis, and ending with the race towards an atomic structure of PS I."/> <meta name="prism.issn" content="1573-5079"/> <meta name="prism.publicationName" content="Photosynthesis Research"/> <meta name="prism.volume" content="80"/> <meta name="prism.number" content="1"/> <meta name="prism.section" content="OriginalPaper"/> <meta name="prism.startingPage" content="109"/> <meta name="prism.endingPage" content="124"/> <meta name="prism.copyright" content="2004 Kluwer Academic Publishers"/> <meta name="prism.rightsAgent" content="journalpermissions@springernature.com"/> <meta name="prism.url" content="https://link.springer.com/article/10.1023/B:PRES.0000030657.88242.e1"/> <meta name="prism.doi" content="doi:10.1023/B:PRES.0000030657.88242.e1"/> <meta name="citation_pdf_url" content="https://link.springer.com/content/pdf/10.1023/B:PRES.0000030657.88242.e1.pdf"/> <meta name="citation_fulltext_html_url" content="https://link.springer.com/article/10.1023/B:PRES.0000030657.88242.e1"/> <meta name="citation_journal_title" content="Photosynthesis Research"/> <meta name="citation_journal_abbrev" content="Photosynthesis Research"/> <meta name="citation_publisher" content="Kluwer Academic Publishers"/> <meta name="citation_issn" content="1573-5079"/> <meta name="citation_title" content="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts"/> <meta name="citation_volume" content="80"/> <meta name="citation_issue" content="1"/> <meta name="citation_publication_date" content="2004/04"/> <meta name="citation_firstpage" content="109"/> <meta name="citation_lastpage" content="124"/> <meta name="citation_article_type" content="Article"/> <meta name="citation_language" content="en"/> <meta name="dc.identifier" content="doi:10.1023/B:PRES.0000030657.88242.e1"/> <meta name="DOI" content="10.1023/B:PRES.0000030657.88242.e1"/> <meta name="size" content="308655"/> <meta name="citation_doi" content="10.1023/B:PRES.0000030657.88242.e1"/> <meta name="citation_springer_api_url" content="http://api.springer.com/xmldata/jats?q=doi:10.1023/B:PRES.0000030657.88242.e1&amp;api_key="/> <meta name="description" content="This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most com"/> <meta name="dc.creator" content="Fromme, Petra"/> <meta name="dc.creator" content="Mathis, Paul"/> <meta name="dc.subject" content="Plant Sciences"/> <meta name="dc.subject" content="Plant Physiology"/> <meta name="dc.subject" content="Biochemistry, general"/> <meta name="dc.subject" content="Plant Genetics and Genomics"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Monomeric and trimeric forms of Photosystem I reaction center of Mastigocladus laminosus: crystallization and preliminary characterization; citation_author=O Almog, G Shoham, D Michaeli, R Nechushtai; citation_volume=88; citation_publication_date=1991; citation_pages=5312-5316; citation_id=CR1"/> <meta name="citation_reference" content="citation_title=Structure and Function of Photosystem I; citation_inbook_title=Thesis; citation_publication_date=1994; citation_id=CR2; citation_author=B Andersen; citation_publisher=Department of Plant Biology, Royal Veterinary and Agricultural University, Frederiksberg C"/> <meta name="citation_reference" content="Andersen B and Scheller HV (eds) (1993) Structure, Function and Assembly of Photosystem I. Academic Press"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Fractionation of the photochemical systems of photosynthesis. I. Chlorophyll content and photochemical activities of particles isolated from spinach chloroplasts; citation_author=JM Anderson, NK Boardman; citation_volume=112; citation_publication_date=1966; citation_pages=403-421; citation_id=CR4"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Plastocyanin participation in chloroplast Photosystem I; citation_author=T Baszynski, J Brand, DW Krogmann, FL Crane; citation_volume=234; citation_publication_date=1971; citation_pages=537-540; citation_id=CR5"/> <meta name="citation_reference" content="citation_journal_title=Biochem Biophys Res Comm; citation_title=The light induced electron paramagnetic resonance signal of photocatalyst P700; citation_author=H Beinert, B Kok, G Hoch; citation_volume=7; citation_publication_date=1962; citation_pages=209-212; citation_id=CR6"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Purification and properties of the Photosystem I reaction center from chloroplasts; citation_author=C Bengis, N Nelson; citation_volume=250; citation_publication_date=1975; citation_pages=2783-2788; citation_id=CR7"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Subunit structure of chloroplast Photosystem I reaction center; citation_author=C Bengis, N Nelson; citation_volume=252; citation_publication_date=1977; citation_pages=4564-4569; citation_id=CR8"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Crystal structure of plant Photosystem I; citation_author=A Ben-Shem, F Frolow, N Nelson; citation_volume=426; citation_publication_date=2003; citation_pages=630-635; citation_id=CR9"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Iron deficiency induces the formation of an antenna ring around trimeric Photosystem I in cyanobacteria; citation_author=TS Bibby, J Nield, F Partensky, J Barber; citation_volume=412; citation_publication_date=2001; citation_pages=743-745; citation_id=CR10"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Pulse EPR structure analysis of Photosystem I single crystals: localization of the phylloquinone acceptor; citation_author=R Bittl, SG Zech, P Fromme, HT Witt, W Lubitz; citation_volume=36; citation_publication_date=1997; citation_pages=12001-12004; citation_id=CR11"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Origin and early evaluation of photosynthesis; citation_author=RE Blankenship; citation_volume=33; citation_publication_date=1992; citation_pages=91-111; citation_id=CR12"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Fluorescence properties of particles obtained by digitonin fragmentation of spinach chloroplasts; citation_author=NK Boardman, SW Thorne, JM Anderson; citation_volume=56; citation_publication_date=1966; citation_pages=586-593; citation_id=CR13"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Evidence for a trimeric organization of the Photosystem I complex from the thermophilic cyanobacterium Synechococcus sp; citation_author=EJ Boekema, JP Dekker, M van Heel, M R&#246;gner, W Saenger, I Witt, H Witt; citation_volume=217; citation_publication_date=1987; citation_pages=283-286; citation_id=CR14"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Refined analysis of the trimeric structure of the isolated photosystem I complex from the thermophilic cyanobacterium Synechococcus sp; citation_author=EJ Boekema, JP Dekker, M R&#246;gner, W Saenger, I Witt, H Witt, M van Heel; citation_volume=974; citation_publication_date=1989; citation_pages=81-87; citation_id=CR15"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=The structure of spinach Photosystem I studied by electron microscopy; citation_author=EJ Boekema, RM Wynn, R Malkin; citation_volume=1017; citation_publication_date=1990; citation_pages=49-56; citation_id=CR16"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=A giant chlorophyll-protein complex induced by iron deficiency in cyanobacteria; citation_author=EJ Boekema, A Hifney, AE Yakushevska, M Piotrowski, W Keegstra, S Berry, K-P Michel, EK Pistorius, J Kruip; citation_volume=412; citation_publication_date=2001; citation_pages=745-748; citation_id=CR17"/> <meta name="citation_reference" content="citation_journal_title=Eur J Biochem; citation_title=Photoreactions of cytochromes in algal chloroplasts; citation_author=H Bohme, KJ Kunert; citation_volume=106; citation_publication_date=1980; citation_pages=329-336; citation_doi=10.1111/j.1432-1033.1980.tb06027.x; citation_id=CR18"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Identification of multiple components in the intermediary electron carrier complex of Photosystem I; citation_author=J Bonnerjea, MCW Evans; citation_volume=148; citation_publication_date=1982; citation_pages=313-316; citation_id=CR19"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=The structure of Photosystem I from the thermophilic cyanobacterium Synechococcus sp; citation_author=B B&#246;ttcher, P Gr&#228;ber, EJ Boekema; citation_volume=1100; citation_publication_date=1992; citation_pages=125-136; citation_id=CR20"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Ferredoxin and flavodoxin from the cyanobacterium Synechocystis sp. PCC 6803; citation_author=H Bottin, B Lagoutte; citation_volume=1101; citation_publication_date=1992; citation_pages=48-56; citation_id=CR21"/> <meta name="citation_reference" content="citation_journal_title=Biochem Biophys Res Comm; citation_title=Dichroism of chlorophyll a I absorption change at 700 nm using chloroplasts oriented in a magnetic field; citation_author=J Breton, E Roux, J Whitmarsh; citation_volume=64; citation_publication_date=1975; citation_pages=1274-1277; citation_id=CR22"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=FTIR study of the primary electron donor of Photosystem I (P700) revealing delocalization of the charge in P700+ and localization of the triplet character in 3P700; citation_author=J Breton, E Nabedryk, W Leibl; citation_volume=38; citation_publication_date=1999; citation_pages=11585-11592; citation_id=CR23"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Electron transfer and arrangement of the redox cofactors in Photosystem I; citation_author=K Brettel; citation_volume=1318; citation_publication_date=1997; citation_pages=322-373; citation_id=CR24"/> <meta name="citation_reference" content="citation_journal_title=Photosyn Res; citation_title=Spectral and kinetic characterization of electron acceptor A1 in a Photosystem I core devoid of iron-sulfur centers FX, FB and FA; citation_author=K Brettel, JH Golbeck; citation_volume=45; citation_publication_date=1995; citation_pages=183-193; citation_id=CR25"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Electron transfer in Photosystem I; citation_author=K Brettel, W Leibl; citation_volume=1507; citation_publication_date=2001; citation_pages=100-114; citation_id=CR26"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Some properties of spinach chloroplast fractions obtained by digitonin solubilization; citation_author=CN Cederstrand, null Govindjee; citation_volume=120; citation_publication_date=1966; citation_pages=177-180; citation_id=CR27"/> <meta name="citation_reference" content="citation_journal_title=Plant Physiol; citation_title=Photosystem I; citation_author=PR Chitnis; citation_volume=111; citation_publication_date=1996; citation_pages=661-669; citation_id=CR28"/> <meta name="citation_reference" content="citation_title=Electron spin resonance studies of photosynthetic systems; citation_inbook_title=Light and Life; citation_publication_date=1961; citation_pages=356-377; citation_id=CR29; citation_author=B Commoner; citation_publisher=The John Hopkins Press"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Light-induced paramagnetism in chloroplasts; citation_author=B Commoner, JJ Heise, J Townsend; citation_volume=42; citation_publication_date=1956; citation_pages=710-718; citation_id=CR30"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Spin-lattice relaxation of the phylloquinone radical of Photosystem I; citation_author=Y Deligiannakis, J Hanley, AW Rutherford; citation_volume=37; citation_publication_date=1997; citation_pages=3329-3336; citation_id=CR31"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Electron transfer in Photosystem I. Reaction centers follow a linear pathway in which iron-sulfur cluster FB is the immediate electron donor to soluble ferredoxin; citation_author=A Diaz-Quintana, W Leibl, H Bottin, P S&#233;tif; citation_volume=37; citation_publication_date=1998; citation_pages=3429-3439; citation_id=CR32"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=The P700-chlorophyll aprotein of a blue-green alga; citation_author=WE Dietrich, JP Thornber; citation_volume=245; citation_publication_date=1971; citation_pages=482-493; citation_id=CR33"/> <meta name="citation_reference" content="citation_journal_title=Naturwissenschaften; citation_title=Some new results in photosynthesis, the action of two chlorophyll aI molecules in light reaction I of photosynthesis; citation_author=G D&#246;ring, JL Bailey, J Weikara, HT Witt; citation_volume=5; citation_publication_date=1968; citation_pages=219-224; citation_id=CR34"/> <meta name="citation_reference" content="citation_title=Cytochrome oxidation by a second photochemical system in the red alga ; citation_inbook_title=Proceedings of the 3rd International Congress on Photobiology, Copenhagen; citation_publication_date=1960; citation_pages=135-142; citation_id=CR35; citation_author=LNM Duysens; citation_publisher=Elsevier"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=The discovery of the two photosynthetic systems: a personal account; citation_author=LNM Duysens; citation_volume=21; citation_publication_date=1989; citation_pages=61-79; citation_id=CR36"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Two photochemical systems in photosynthesis; citation_author=LNM Duysens, J Amesz, BM Kamp; citation_volume=190; citation_publication_date=1961; citation_pages=510-511; citation_id=CR37"/> <meta name="citation_reference" content="citation_journal_title=Chem Phys Lett; citation_title=Electron spin echo of spin polarized radical pairs in the intact quinone reconstituted plant Photosystem I reaction center; citation_author=SA Dzuba, P Gast, AJ Hoff; citation_volume=236; citation_publication_date=1997; citation_pages=595-602; citation_id=CR38"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Determination of the oxidation-reduction potential of the bound iron-sulphur proteins of the primary electron acceptor complex of Photosystem I in spinach chloroplasts; citation_author=MCW Evans, SG Reeves, R Cammack; citation_volume=49; citation_publication_date=1974; citation_pages=111-114; citation_id=CR39"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Primary electron acceptor complex of Photosystem I in spinach chloroplasts; citation_author=MCW Evans, CK Sihra, JR Bolton, R Cammack; citation_volume=256; citation_publication_date=1975; citation_pages=668-670; citation_id=CR40"/> <meta name="citation_reference" content="citation_journal_title=EMBO J; citation_title=Isolation of a psaF-deficient mutant of Chlamydomonas reinhardtii: efficient interaction of plastocyanin with the Photosystem I reaction center is mediated by the PsaF subunit; citation_author=J Farah, F Rappaport, Y Choquet, P Joliot, JD Rochaix; citation_volume=14; citation_publication_date=1995; citation_pages=4976-4984; citation_id=CR41"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Two partially homologous adjacent light-inducible maize chloroplast genes encoding polypeptides of the P700 chlorophyll a protein complex of Photosystem I; citation_author=L Fish, U Kuck, L Bogorad; citation_volume=260; citation_publication_date=1985; citation_pages=1413-1421; citation_id=CR42"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Investigation of highly stable Photosystem I chlorophyll-protein complexes from the thermophilic cyanobacterium Phormidium laminosum ; citation_author=RC Ford; citation_volume=893; citation_publication_date=1987; citation_pages=115-125; citation_id=CR43"/> <meta name="citation_reference" content="citation_journal_title=EMBO J; citation_title=Investigation of the structure of trimeric and monomeric Photosytem I reaction centre complexes; citation_author=RC Ford, A Holzenburg; citation_volume=7; citation_publication_date=1988; citation_pages=2287-2293; citation_id=CR44"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Structural studies on improved crystals of the Photosystem I reaction centre from Phormidium laminosum ; citation_author=R Ford, R Paupit, A Holzenburg; citation_volume=238; citation_publication_date=1988; citation_pages=385-389; citation_id=CR45"/> <meta name="citation_reference" content="citation_journal_title=EMBO J; citation_title=Ordered arrays of the Photosystem I reaction centre after reconstitution: projections and surface reliefs of the complex at 2 nm resolution; citation_author=RC Ford, A Hefti, A Engel; citation_volume=9; citation_publication_date=1990; citation_pages=3067-3075; citation_id=CR46"/> <meta name="citation_reference" content="citation_journal_title=J Mol Biol; citation_title=Surface analysis of the Photosystem I complex by electron and atomic force microscopy; citation_author=D Fotiadis, DJ Muller, G Tsiotis, L Hasler, P Tittmann, T Mini, P Jeno, H Gross, A Engel; citation_volume=283; citation_publication_date=1998; citation_pages=83-94; citation_id=CR47"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Triplet states in Photosystem I of spinach chloroplasts and subchloroplast particles; citation_author=K Frank, MB McLean, K Sauer; citation_volume=76; citation_publication_date=1979; citation_pages=5124-5128; citation_id=CR48"/> <meta name="citation_reference" content="citation_title=Crystallization of Photosystem I for structural analysis; citation_inbook_title=Habilitation; citation_publication_date=1998; citation_id=CR49; citation_author=P Fromme; citation_publisher=Technical University Berlin"/> <meta name="citation_reference" content="citation_title=Crystallization of Photosystem I; citation_inbook_title=Methods and Results in Crystallization of Membrane Proteins; citation_publication_date=2003; citation_pages=147-173; citation_id=CR50; citation_author=P Fromme; citation_publisher=International University Line"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Structure of Photosystem I; citation_author=P Fromme, P Jordan, N Krau&#223;; citation_volume=1507; citation_publication_date=2001; citation_pages=5-31; citation_id=CR51"/> <meta name="citation_reference" content="citation_journal_title=Biophys J; citation_title=Crystallization and electron paramagnetic resonance characterization of the complex of Photosystem I with its natural electron acceptor ferredoxin; citation_author=P Fromme, H Bottin, N Krau&#223;, P S&#233;tif; citation_volume=83; citation_publication_date=2002; citation_pages=1760-1773; citation_id=CR52"/> <meta name="citation_reference" content="citation_journal_title=J Am Chem Soc; citation_title=Anion radicals of pheophytin and chlorophyll a: their role in the primary charge separations of plant photosynthesis; citation_author=I Fujita, MS Davis, J Fajer; citation_volume=100; citation_publication_date=1978; citation_pages=6280-6282; citation_id=CR53"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Evidence for a new early acceptor in Photosystem I of plants. An ESR investigation of reaction center triplet yield and of the reduced intermediary acceptors; citation_author=P Gast, T Swarthoff, FCR Ebskamp, AJ Hoff; citation_volume=722; citation_publication_date=1983; citation_pages=163-175; citation_id=CR54"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Supramolecular organization of Photosystem I and light-harvesting complex I in Chlamydomonas reinhardtii ; citation_author=M Germano, AE Yakushevska, W Keegstra, HJ van Gorkom, JP Dekker, EJ Boekema; citation_volume=525; citation_publication_date=2002; citation_pages=121-125; citation_id=CR55"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Energy transfer and trapping in Photosystem I; citation_author=B Gobets, R van Grondelle; citation_volume=1507; citation_publication_date=2001; citation_pages=80-99; citation_id=CR56"/> <meta name="citation_reference" content="citation_journal_title=Plant Physiol; citation_title=Photosystem I; citation_author=JH Golbeck; citation_volume=111; citation_publication_date=1996; citation_pages=661-669; citation_id=CR57"/> <meta name="citation_reference" content="citation_journal_title=Curr Top Bioenerg; citation_title=Photosystem I; citation_author=JH Golbeck, DA Bryant; citation_volume=16; citation_publication_date=1991; citation_pages=83-177; citation_id=CR58"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Photosystem I charge separation in the absence of centers A and B. I; citation_author=JH Golbeck, JM Cornelius; citation_volume=849; citation_publication_date=1986; citation_pages=16-24; citation_id=CR59"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Evidence for two active branches for electron transfer in Photosystem I; citation_author=M Guergova-Kuras, B Boudreaux, A Joliot, P Joliot, K Redding; citation_volume=98; citation_publication_date=2001; citation_pages=4437-4442; citation_id=CR60"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=A Fourier transform infrared absorption difference spectrum associated with the reduction of A1 in Photosystem I: are both phylloquinones involved in electron transfer?; citation_author=G Hastings, V Sivakumar; citation_volume=40; citation_publication_date=2001; citation_pages=3681-3689; citation_id=CR61"/> <meta name="citation_reference" content="citation_title=Electron transfer from cytochrome 553 to P700 in cyanobacterial reaction center complexes with and without bound PsaF gene product; citation_inbook_title=Research in Photosynthesis; citation_publication_date=1992; citation_pages=601-604; citation_id=CR62; citation_author=H Hatanaka; citation_author=K Sonoike; citation_author=M Hirano; citation_author=S Katoh; citation_publisher=Kluwer Academic Publishers"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Small subunits of Photosystem I reaction center complexes from Synechococcus elongatus. I. Is the psaF gene product required for oxidation of cytochrome c-553?; citation_author=H Hatanaka, K Sonoike, M Hirano, S Katoh; citation_volume=1141; citation_publication_date=1993; citation_pages=45-51; citation_id=CR63"/> <meta name="citation_reference" content="citation_journal_title=Curr Genet; citation_title=The gene for the 9 kD polypeptide, a possible apoprotein for the iron-sulfur centers A and B of the Photosystem I complex, in tobacco chloroplast DNA; citation_author=N Hayashida, T Matsubayashi, K Shinozaki, M Sugiura, K Inoue, T Hiyama; citation_volume=12; citation_publication_date=1987; citation_pages=247-250; citation_id=CR64"/> <meta name="citation_reference" content="citation_title=Electron nuclear double resonance (ENDOR) studies of the phylloquinone electron acceptor (A1) in the Photosystem I reaction centre; citation_inbook_title=Photosynthesis: from Light to Biosphere; citation_publication_date=1995; citation_pages=163-166; citation_id=CR65; citation_author=P Heathcote; citation_author=SEJ Rigby; citation_author=MC Evans; citation_publisher=Kluwer Academic Publishers"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Photoaccumulation in Photosystem I does produce a phylloquinone (A1.-) radical; citation_author=P Heathcote, P Moenne-Loccoz, SE Rigby, MC Evan; citation_volume=35; citation_publication_date=1996; citation_pages=6644-6650; citation_id=CR66"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Primary charge separation in Photosystem I: a two-step electrogenic charge separation connected with P700+A0 - and P700+A1 - formation; citation_author=B Hecks, K Wulf, J Breton, W. Leibl, H-W Trissl; citation_volume=33; citation_publication_date=1994; citation_pages=8619-8625; citation_id=CR67"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Analysis of the structure of Photosystem I in cyanobacterial thylakoid membranes; citation_author=A Hefti, RC Ford, M Miller, RP Cox, A Engel; citation_volume=296; citation_publication_date=1992; citation_pages=29-32; citation_id=CR68"/> <meta name="citation_reference" content="Herrmann RG, Oelmueller R, Bichker J, Schneidbauer A, Stepphuhn J, Wedel N, Tyagi AK and Westhoff P (1991) The thylakoid membrane of higher plants: genes, their expression and interaction. In: Herrmann RG and Larkins BA (eds) Plant Molecular Biology, 2. Plenum, New York"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Function of the two cytochrome components in chloroplasts: a working hypothesis; citation_author=R Hill, F Bendall; citation_volume=186; citation_publication_date=1960; citation_pages=136-137; citation_id=CR70"/> <meta name="citation_reference" content="citation_journal_title=EMBO J; citation_title=The plastocyanin binding domain of Photosystem I; citation_author=M Hippler, J Reichert, M Sutter, E Zak, L Altschmied, U Schroer, RG Herrmann, W Haehnel; citation_volume=15; citation_publication_date=1996; citation_pages=6374-6384; citation_id=CR71"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=A new photosynthetic pigment, &#39;P430&#39;: its possible role as the primary electron acceptor of Photosystem I; citation_author=T Hiyama, B Ke; citation_volume=68; citation_publication_date=1971; citation_pages=1010-1013; citation_id=CR72"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Identification of a chloroplast-encoded 9-kDa polypeptide as a 2[4Fe- 4S] protein carrying centers A and B of Photosystem I; citation_author=PB H&#248;j, I Svendsen, HV Scheller, BL M&#248;ller; citation_volume=262; citation_publication_date=1987; citation_pages=12676-12684; citation_id=CR73"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Identities of four low-molecular-mass subunits of the Photosystem I complex from Anabaena variabilis ATCC 29413. Evidence for the presence of the psaI gene product in a cyanobacterial complex; citation_author=M Ikeuchi, KJ Nyhus, Y Inoue, HB Pakrasi; citation_volume=287; citation_publication_date=1991; citation_pages=5-9; citation_id=CR74"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Extraction of vitamin K-1from Photosystem I particles by treatment with diethyl ether and its effects on the A-1 EPR signal and System I photochemistry; citation_author=S Itoh, M Iwaki, I Ikegami; citation_volume=893; citation_publication_date=1987; citation_pages=508-516; citation_id=CR75"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Photoaffinity labeling of the phylloquinone-binding polypeptides by 2-azidoanthraquinone in Photosystem I particles; citation_author=M Iwaki, M Takahashi, K Shimada, Y Takahashi, S Itoh; citation_volume=312; citation_publication_date=1992; citation_pages=27-30; citation_id=CR76"/> <meta name="citation_reference" content="citation_journal_title=Plant Physiol; citation_title=Nearest-neighbor analysis of higher-plant Photosystem I holocomplex; citation_author=S Jansson, B Andersen, HV Scheller; citation_volume=112; citation_publication_date=1996; citation_pages=409-420; citation_id=CR77"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Photosystem I from Synechococcus elongatus: preparation and crystallization of monomers with varying subunit compositions; citation_author=P Jekow, P Fromme, H Witt, W Saenger; citation_volume=1229; citation_publication_date=1995; citation_pages=115-120; citation_id=CR78"/> <meta name="citation_reference" content="citation_journal_title=Z Naturforsch; citation_title=Crystallisation of intact and subunit L-deficient monomers from Synechocystis PCC 6803 Photosystem I; citation_author=P Jekow, P Fromme, H Witt, W Saenger; citation_volume=51c; citation_publication_date=1996; citation_pages=195-199; citation_id=CR79"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Three-dimensional structure of cyanobacterial Photosystem I at 2.5A resolution; citation_author=P Jordan, P Fromme, HT Witt, O Klukas, W Saenger, N Krau&#223;; citation_volume=411; citation_publication_date=2001; citation_pages=909-917; citation_id=CR80"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Three-dimensional reconstruction of a light-harvesting complex I-Photosystem I (LHCI-PSI) supercomplex from the green alga Chlamydomonas reinhardtii. Insights into light harvesting for PSI; citation_author=J Kargul, J Nield, J Barber; citation_volume=278; citation_publication_date=2003; citation_pages=16135-16141; citation_id=CR81"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Early research on the role of plastocyanin in photosynthesis; citation_author=S Kathoh; citation_volume=76; citation_publication_date=2003; citation_pages=255-261; citation_id=CR82"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Activities of chloroplast fragments. I. Hill reaction and ascorbate-indophenol photoreductions; citation_author=S Katoh, A San Pietro; citation_volume=241; citation_publication_date=1966; citation_pages=3575-3581; citation_id=CR83"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Oxidation-reduction potentials of bound iron-sulfur proteins of Photosystem I; citation_author=B Ke, RE Hansen, H Beinert; citation_volume=70; citation_publication_date=1973; citation_pages=2941-2945; citation_id=CR84"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Two-dimensional crystals of Photosystem I in higher plant grana margins; citation_author=A Kitmitto, A Holzenburg, RC Ford; citation_volume=272; citation_publication_date=1997; citation_pages=19497-19501; citation_id=CR85"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Threedimensional structure of higher plant Photosystem I determined by electron crystallography; citation_author=A Kitmitto, AO Mustafa, A Holzenburg, RC Ford; citation_volume=273; citation_publication_date=1998; citation_pages=29592-29599; citation_id=CR86"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Localization of two phylloquinones, QK and Q , in an improved electron density map of Photosystem I at 4&#197; resolution; citation_author=O Klukas, WD Schubert, P Jordan, N Krau&#223;, P Fromme, HT Witt, W Saenger; citation_volume=274; citation_publication_date=1999; citation_pages=7361-7367; citation_id=CR87"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Photosystem I, an improved model of the stromal subunits PsaC, PsaD, and PsaE; citation_author=O Klukas, WD Schubert, P Jordan, N Krau&#223;, P Fromme, HT Witt, W Saenger; citation_volume=274; citation_publication_date=1999; citation_pages=7351-7360; citation_id=CR88"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=PSI-O, a new 10-kDa subunit of eukaryotic Photosystem I; citation_author=J Knoetzel, A Mant, A Haldrup, PE Jensen, HV Scheller; citation_volume=510; citation_publication_date=2002; citation_pages=145-148; citation_id=CR89"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Identification of Photosystem I components from the cyanobacterium Synechococcus vulcanus by N-terminal sequencing; citation_author=K Koike, M Ikeuchi, T Hiyama, Y Inoue; citation_volume=253; citation_publication_date=1989; citation_pages=257-263; citation_id=CR90"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=On the reversible absorption changes at 705 nm in photosynthetic organisms; citation_author=B Kok; citation_volume=22; citation_publication_date=1956; citation_pages=399-401; citation_id=CR91"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Three-dimensional structure of System I of photosynthesis at 6&#197; resolution; citation_author=N Krau&#223;, W Hinrichs, I Witt, P Fromme, W Pritzkow, Z Dauter, C Betzel, KS Wilson, HT Witt, W Saenger; citation_volume=361; citation_publication_date=1993; citation_pages=326-361; citation_id=CR92"/> <meta name="citation_reference" content="citation_journal_title=Nat Struct Biol; citation_title=Photosystem I at 4&#197; resolution represents the first structural model of a joint photosynthetic reaction centre and core antenna system; citation_author=N Krau#x00DF, WD Schubert, O Klukas, P Fromme, HT Witt, W Saenger; citation_volume=3; citation_publication_date=1996; citation_pages=965-973; citation_id=CR93"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Isolation and structural characterization of monomeric and trimeric Photosystem I complexes (P700.FA/FB and P700.FX) from the cyanobacterium Synechocystis PCC 6803; citation_author=J Kruip, EJ Boekema, D Bald, AF Boonstra, M R&#246;gner; citation_volume=268; citation_publication_date=1993; citation_pages=23353-23360; citation_id=CR94"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Orientation of the phylloquinone electron acceptor anion radical in Photosystem I; citation_author=F MacMillan, J Hanley, L van der Weerd, M Knupling, S Un, AW Rutherford; citation_volume=36; citation_publication_date=1997; citation_pages=9297-9303; citation_id=CR95"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Primary reactions of photosynthesis: photoreduction of a bound chloroplast ferredoxin at low temperature as detected by EPR spectroscopy; citation_author=R Malkin, AJ Bearden; citation_volume=68; citation_publication_date=1971; citation_pages=16-19; citation_id=CR96"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Rapidly reversible flashinduced electron transfer in a P-700 chlorophyll-protein complex isolated with SDS; citation_author=P Mathis, K Sauer, R R&#233;my; citation_volume=88; citation_publication_date=1978; citation_pages=275-278; citation_id=CR97"/> <meta name="citation_reference" content="citation_journal_title=Gene; citation_title=Genes encoding eleven subunits of Photosystem I from the thermophilic cyanobacterium Synechococcus sp.; citation_author=U M&#252;hlenhoff, W Haehnel, HT Witt, RG Herrmann; citation_volume=127; citation_publication_date=1993; citation_pages=71-78; citation_id=CR98"/> <meta name="citation_reference" content="citation_journal_title=Plant Physiol; citation_title=Chlorophyll proteins of Photosystem I; citation_author=JE Mullet, JJ Burke, CJ Arntzen; citation_volume=65; citation_publication_date=1980; citation_pages=814-822; citation_doi=10.1104/pp.65.5.814; citation_id=CR99"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Photosystem I reaction center from the thermophilic cyanobacterium Mastigocladus laminosus ; citation_author=R Nechushtai, P Muster, A Binder, V Liveanu, N Nelson; citation_volume=80; citation_publication_date=1983; citation_pages=1179-1183; citation_id=CR100"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Photosystem I reaction center: past and future; citation_author=N Nelson, A Ben-Shem; citation_volume=73; citation_publication_date=2002; citation_pages=193-206; citation_id=CR101"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Isolation and characterization of Photosystem I and II membrane particles from the blue-green alga, Synechococcus cedorum ; citation_author=PJ Newman, LA Sherman; citation_volume=503; citation_publication_date=1978; citation_pages=343-361; citation_id=CR102"/> <meta name="citation_reference" content="citation_journal_title=Trends Biochem Sci; citation_title=Photosynthetic reaction centres: variations on a common structural theme?; citation_author=W Nitschke, AW Rutherford; citation_volume=16; citation_publication_date=1991; citation_pages=241-245; citation_id=CR103"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Electron spin resonance of chlorophyll and the origin of Signal I in photosynthesis; citation_author=JR Norris, RA Uphaus, HL Crespi, JJ Katz; citation_volume=68; citation_publication_date=1971; citation_pages=625-628; citation_id=CR104"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=An electronnuclear double resonance (Endor) study of the special pair model for the photoreactive chlorophyll in photosynthesis; citation_author=JR Norris, H Scheer, ME Druyan, JJ Katz; citation_volume=71; citation_publication_date=1974; citation_pages=4897-4900; citation_id=CR105"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_author=AM Nuijs, VA Shuvalov, HJ van Gorkom, JJ Plijter, LNM Duysens; citation_volume=850; citation_publication_date=1986; citation_pages=310-318; citation_id=CR106"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Two pigment proteins in spinach chloroplasts; citation_author=T Ogawa, F Obata, K Shibata; citation_volume=112; citation_publication_date=1966; citation_pages=223-234; citation_id=CR107"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Properties and structure of fractions prepared from Anabaena variabilis by the action of Triton X-100; citation_author=T Ogawa, LP Vernon, HH Mollenhauer; citation_volume=172; citation_publication_date=1969; citation_pages=216-223; citation_id=CR108"/> <meta name="citation_reference" content="citation_journal_title=J Biochem (Tokyo); citation_title=The protein responsible for center A/B in spinach Photosystem I: isolation with iron-sulfur cluster(s) and complete sequence analysis; citation_author=H Oh-oka, Y Takahashi, K Kuriyama, K Saeki, H Matsubara; citation_volume=103; citation_publication_date=1988; citation_pages=962-968; citation_id=CR109"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Exciton interaction in the Photosystem I reaction center from spinach chloroplasts. Absorption and circular dichroism difference spectra; citation_author=KD Philipson, VL Sato, K Sauer; citation_volume=11; citation_publication_date=1972; citation_pages=4591-4595; citation_id=CR110"/> <meta name="citation_reference" content="citation_title=Photosynthesis and related processes; citation_publication_date=1956; citation_id=CR111; citation_author=EI Rabinowitch; citation_publisher=Interscience Publishers"/> <meta name="citation_reference" content="citation_journal_title=Biochem Biophys Res Comm; citation_title=Isolation of a reaction center fraction from Rhodopseudomonas sphaeroides ; citation_author=D Reed, RK Clayton; citation_volume=30; citation_publication_date=1968; citation_pages=471-475; citation_id=CR112"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Photoaccumulation of the PsaB phyllosemiquinone inPhotosystem I of Chlamydomonas reinhardtii ; citation_author=SE Rigby, IP Muhiuddin, MC Evans, S Purton, P Heathcote; citation_volume=1556; citation_publication_date=2002; citation_pages=13-20; citation_id=CR113"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Mono-, di-, and trimeric PS I reaction center complexes isolated from the thermophilic cyano-bacterium Synechoccus sp. Size, shape and activity; citation_author=M R&#246;gner, U M&#252;hlenhoff, EJ Boekema, HT Witt; citation_volume=1015; citation_publication_date=1990; citation_pages=415-424; citation_id=CR114"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Reaction center triplet states in Photosystem I and Photosystem II; citation_author=AW Rutherford, JE Mullet; citation_volume=635; citation_publication_date=1981; citation_pages=225-235; citation_id=CR115"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Orientation of P700, the primary electron donor of Photosystem I; citation_author=AW Rutherford, P S&#233;tif; citation_volume=1019; citation_publication_date=1990; citation_pages=128-132; citation_id=CR116"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Electron acceptors associated with P-700 in Triton solubilized Photosystem I particles from spinach chloroplasts; citation_author=K Sauer, P Mathis, S Acker, JA van Best; citation_volume=503; citation_publication_date=1978; citation_pages=120-134; citation_id=CR117"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Phylloquinone copurifies with the large subunit of Photosystem I; citation_author=HU Schoeder, W Lockau; citation_volume=199; citation_publication_date=1986; citation_pages=23-27; citation_id=CR118"/> <meta name="citation_reference" content="citation_journal_title=J Mol Biol; citation_title=Photosystem I of Synechococcus elongatus at 4&#197; resolution: comprehensive structure analysis; citation_author=WD Schubert, O Klukas, N Krau&#223;, W Saenger, P Fromme, HT Witt; citation_volume=272; citation_publication_date=1997; citation_pages=741-769; citation_id=CR119"/> <meta name="citation_reference" content="citation_journal_title=J Mol Biol; citation_title=A common ancestor for oxygenic and anoxygenic photosynthetic systems: a comparison based on the structural model of Photosystem I; citation_author=WD Schubert, O Klukas, W Saenger, HT Witt, P Fromme, N Krau&#223;; citation_volume=280; citation_publication_date=1998; citation_pages=297-314; citation_id=CR120"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Photosystem I photochemistry under highly reducing conditions: study of the P700 triplet state formation from the secondary radical pair (P700+-A1 -); citation_author=P S&#233;tif, K Brettel; citation_volume=1020; citation_publication_date=1990; citation_pages=232-238; citation_id=CR121"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Flash-induced absorption changes in Photosystem I. Radical pair or triplet state formation?; citation_author=P S&#233;tif, G Hervo, P Mathis; citation_volume=638; citation_publication_date=1981; citation_pages=257-267; citation_id=CR122"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=The ferredoxin docking site of Photosystem I; citation_author=P Setif, N Fischer, B Lagoutte, H Bottin, JD Rochaix; citation_volume=1555; citation_publication_date=2002; citation_pages=204-209; citation_id=CR123"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Enzymic mechanisms of pyridine nucleotide reduction in chloroplasts; citation_author=M Shin, DI Arnon; citation_volume=240; citation_publication_date=1965; citation_pages=1405-1411; citation_id=CR124"/> <meta name="citation_reference" content="citation_title=The Photosystem I reaction center of -structural and functional aspects; citation_inbook_title=Current Research in Photosynthesis; citation_publication_date=1990; citation_pages=755-762; citation_id=CR125; citation_author=G Shoham; citation_author=D Michaeli; citation_author=R Nechustai; citation_publisher=Kluwer Academic Publishers"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=The study of the primary photoprocesses in Photosystem I of chloroplasts. Recombination luminescence, chlorophyll triplet state and triplet-triplet annihilation; citation_author=VA Shuvalov; citation_volume=430; citation_publication_date=1976; citation_pages=113-121; citation_id=CR126"/> <meta name="citation_reference" content="citation_journal_title=Arch Biochem Biophys; citation_title=Functional subunit structure of Photosystem I reaction center in Synechococcus sp; citation_author=Y Takahashi, S Katoh; citation_volume=219; citation_publication_date=1982; citation_pages=219-227; citation_id=CR127"/> <meta name="citation_reference" content="citation_journal_title=Brookhaven Symp Biol; citation_title=The organization of chlorophyll in the plant photosynthetic unit; citation_author=JP Thornber, RS Alberte, FA Hunter, JA Shiozawa, KS Kan; citation_volume=28; citation_publication_date=1976; citation_pages=132-148; citation_id=CR128"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Purification and crystallisation of Photosystem I complex from a phycobilisome-less mutant of the cyanobacterial Synechococcus PCC 7002; citation_author=G Tsiotis, W Nitschke, W Haase, H Michel; citation_volume=35; citation_publication_date=1993; citation_pages=285-297; citation_id=CR129"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Characterization of trimeric Photosystem I particles from prochlorophyte Prochlorothrix hollandica by electron microscopy and image analysis; citation_author=GWM van der Staay, EJ Boekema, JP Dekker, HCP Matthijs; citation_volume=1142; citation_publication_date=1993; citation_pages=189-193; citation_id=CR130"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Evolution of heliobacteria: implications for photosynthetic reaction center complexes; citation_author=WFJ Vermaas; citation_volume=41; citation_publication_date=1994; citation_pages=285-294; citation_id=CR131"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=A photochemically active particle derived from chloroplasts by the action of the detergent Triton X-100; citation_author=LP Vernon, ER Shaw, B Ke; citation_volume=241; citation_publication_date=1966; citation_pages=4101-4109; citation_id=CR132"/> <meta name="citation_reference" content="citation_journal_title=J Phys Chem; citation_title=Structure of the reaction center of Photosystem I of plants. An investigation with lineardichroic absorbance-detected magnetic resonance; citation_author=J Vrieze, P Gast, AJ Hoff; citation_volume=100; citation_publication_date=1996; citation_pages=9960-9967; citation_id=CR133"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Evidence, that a chlorophyll a&#8242; dimer constitutes the photochemical reaction centre 1 (P700) in photosynthetic apparatus; citation_author=T Watanabe, M Kobayashi, A Hongu, M Nakazato, T Hiyama; citation_volume=235; citation_publication_date=1985; citation_pages=252-256; citation_id=CR134"/> <meta name="citation_reference" content="citation_journal_title=Biochim Biophys Acta; citation_title=Isolation of a chloroplast fragment fraction with NADP+-photoreducing activity dependent on plastocyanin and independent of cytochrome f ; citation_author=JSC Wessels; citation_volume=126; citation_publication_date=1966; citation_pages=581-583; citation_id=CR135"/> <meta name="citation_reference" content="citation_journal_title=Proc Natl Acad Sci USA; citation_title=Cyanobacterial Photosystem I: morphology and aggregation behavior; citation_author=JC Williams, AN Glazer, DJ Lundell; citation_volume=80; citation_publication_date=1983; citation_pages=5923-5926; citation_id=CR136"/> <meta name="citation_reference" content="citation_journal_title=Photosynth Res; citation_title=Steps on the way to building blocks, topologies, crystals and X-ray structural analysis of Photosystems I and II of water-oxidizing photosynthesis; citation_author=HT Witt; citation_volume=80; citation_publication_date=2004; citation_pages=85-107; citation_id=CR137"/> <meta name="citation_reference" content="citation_title=Three-dimensional crystals of Photosystem I from sp. and X-ray structure analysis at 6&#197; resolution; citation_inbook_title=Research in Photosynthesis; citation_publication_date=1992; citation_pages=521-528; citation_id=CR138; citation_author=H Witt; citation_author=N Krau&#223;; citation_author=W Hinrichs; citation_author=I Witt; citation_author=P Fromme; citation_author=W Saenger; citation_publisher=Kluwer Academic Publishers"/> <meta name="citation_reference" content="citation_journal_title=Nature; citation_title=Experimental evidence for the mechanism of photosynthesis; citation_author=HT Witt, A M&#252;ller, B Rumberg; citation_volume=191; citation_publication_date=1961; citation_pages=194-195; citation_id=CR139"/> <meta name="citation_reference" content="citation_journal_title=FEBS Lett; citation_title=Crystallization of reaction center I of photosynthesis; citation_author=I Witt, H Witt, S Gerken, W Saenger, J Dekker, M R&#246;gner; citation_volume=221; citation_publication_date=1987; citation_pages=260-264; citation_id=CR140"/> <meta name="citation_reference" content="citation_journal_title=Ber Bunsenges Phys Chem; citation_title=X-ray characterization of single crystals of the reaction center I of water splitting photosynthesis; citation_author=I Witt, H Witt, D DiFiore, M R&#246;gner, W Hinrichs, W Saenger, J Granzin, C Betzel, Z Dauter; citation_volume=92; citation_publication_date=1988; citation_pages=1503-1506; citation_id=CR141"/> <meta name="citation_reference" content="citation_journal_title=Biochemistry; citation_title=Structural and functional properties of the cyanobacterial Photosystem I complex; citation_author=RM Wynn, J Omaha, R Malkin; citation_volume=28; citation_publication_date=1989; citation_pages=5554-5560; citation_id=CR142"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Electron transfer in cyanobacterial Photosystem I. Physiological and spectroscopic characterization of site-directed mutants in a putative electron transfer pathway from A0 through A1 to FX; citation_author=W Xu, PR Chitnis, A Valieva, A Van Der Est, J Pushkar, M Krzystyniak, C Teutloff, SG Zech, R Bittl, D Stehlik, B Zybailov, G Shen, JH Golbeck; citation_volume=278; citation_publication_date=2003; citation_pages=27864-27875; citation_id=CR143"/> <meta name="citation_reference" content="citation_journal_title=J Biol Chem; citation_title=Electron transfer in cyanobacterial Photosystem I: II. Determination of the forward electron transfer rates of site-directed mutants in a putative electron transfer pathway from A0 through A1 to FX; citation_author=W Xu, PR Chitnis, A Valieva, A Van der Est, K Brettel, M Guergova-Kuras, YN Pushkar, SG Zech, D Stehlik, G Shen, B Zybailov, JH Golbeck; citation_volume=278; citation_publication_date=2003; citation_pages=27876-27887; citation_id=CR144"/> <meta name="citation_author" content="Fromme, Petra"/> <meta name="citation_author_institution" content="Department of Chemistry and Biochemistry, Arizona State University, Tempe, USA"/> <meta name="citation_author" content="Mathis, Paul"/> <meta name="citation_author_email" content="mathis.paul@wanadoo.fr"/> <meta name="citation_author_institution" content="D&#233;partement de Biologie Cellulaire et Mol&#233;culaire CEA Saclay, Section de Bio&#233;nerg&#233;tique, Gif-sur-Yvette, Cedex, France"/> <meta name="format-detection" content="telephone=no"/> <meta name="citation_cover_date" content="2004/04/01"/> <meta property="og:url" content="https://link.springer.com/article/10.1023/B:PRES.0000030657.88242.e1"/> <meta property="og:type" content="article"/> <meta property="og:site_name" content="SpringerLink"/> <meta property="og:title" content="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts - Photosynthesis Research"/> <meta property="og:description" content="This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most complex membrane protein for which detailed structural and functional information is now available. This short historical review cannot cover all the work that has been carried out over more than 50 years, nor provide a deep insight into the structure and function of this protein complex. Instead, this review focuses on more personal views of some of the key discoveries, starting in the 1950s with the discovery of the existence of two photoreactions in oxygenic photosynthesis, and ending with the race towards an atomic structure of PS I."/> <meta property="og:image" content="https://media.springernature.com/full/springer-static/cover-hires/journal/11120"/> <meta name="format-detection" content="telephone=no"> <link rel="apple-touch-icon" sizes="180x180" href=/oscar-static/img/favicons/darwin/apple-touch-icon-92e819bf8a.png> <link rel="icon" type="image/png" sizes="192x192" href=/oscar-static/img/favicons/darwin/android-chrome-192x192-6f081ca7e5.png> <link rel="icon" type="image/png" sizes="32x32" href=/oscar-static/img/favicons/darwin/favicon-32x32-1435da3e82.png> <link rel="icon" type="image/png" sizes="16x16" href=/oscar-static/img/favicons/darwin/favicon-16x16-ed57f42bd2.png> <link rel="shortcut icon" data-test="shortcut-icon" href=/oscar-static/img/favicons/darwin/favicon-c6d59aafac.ico> <meta name="theme-color" content="#e6e6e6"> <!-- Please see discussion: https://github.com/springernature/frontend-open-space/issues/316--> <!--TODO: Implement alternative to CTM in here if the discussion concludes we do not continue with CTM as a practice--> <link rel="stylesheet" media="print" href=/oscar-static/app-springerlink/css/print-b8af42253b.css> <style> html{text-size-adjust:100%;line-height:1.15}body{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.8;margin:0}details,main{display:block}h1{font-size:2em;margin:.67em 0}a{background-color:transparent;color:#025e8d}sub{bottom:-.25em;font-size:75%;line-height:0;position:relative;vertical-align:baseline}img{border:0;height:auto;max-width:100%;vertical-align:middle}button,input{font-family:inherit;font-size:100%;line-height:1.15;margin:0;overflow:visible}button{text-transform:none}[type=button],[type=submit],button{-webkit-appearance:button}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}summary{display:list-item}[hidden]{display:none}button{cursor:pointer}svg{height:1rem;width:1rem} </style> <style>@media only print, only all and (prefers-color-scheme: no-preference), only all and (prefers-color-scheme: light), only all and (prefers-color-scheme: dark) { body{background:#fff;color:#222;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.8;min-height:100%}a{color:#025e8d;text-decoration:underline;text-decoration-skip-ink:auto}button{cursor:pointer}img{border:0;height:auto;max-width:100%;vertical-align:middle}html{box-sizing:border-box;font-size:100%;height:100%;overflow-y:scroll}h1{font-size:2.25rem}h2{font-size:1.75rem}h1,h2,h4{font-weight:700;line-height:1.2}h4{font-size:1.25rem}body{font-size:1.125rem}*{box-sizing:inherit}p{margin-bottom:2rem;margin-top:0}p:last-of-type{margin-bottom:0}.c-ad{text-align:center}@media only screen and (min-width:480px){.c-ad{padding:8px}}.c-ad--728x90{display:none}.c-ad--728x90 .c-ad__inner{min-height:calc(1.5em + 94px)}@media only screen and (min-width:876px){.js .c-ad--728x90{display:none}}.c-ad__label{color:#333;font-size:.875rem;font-weight:400;line-height:1.5;margin-bottom:4px}.c-ad__label,.c-status-message{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.c-status-message{align-items:center;box-sizing:border-box;display:flex;position:relative;width:100%}.c-status-message :last-child{margin-bottom:0}.c-status-message--boxed{background-color:#fff;border:1px solid #ccc;line-height:1.4;padding:16px}.c-status-message__heading{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:.875rem;font-weight:700}.c-status-message__icon{fill:currentcolor;display:inline-block;flex:0 0 auto;height:1.5em;margin-right:8px;transform:translate(0);vertical-align:text-top;width:1.5em}.c-status-message__icon--top{align-self:flex-start}.c-status-message--info .c-status-message__icon{color:#003f8d}.c-status-message--boxed.c-status-message--info{border-bottom:4px solid #003f8d}.c-status-message--error .c-status-message__icon{color:#c40606}.c-status-message--boxed.c-status-message--error{border-bottom:4px solid #c40606}.c-status-message--success .c-status-message__icon{color:#00b8b0}.c-status-message--boxed.c-status-message--success{border-bottom:4px solid #00b8b0}.c-status-message--warning .c-status-message__icon{color:#edbc53}.c-status-message--boxed.c-status-message--warning{border-bottom:4px solid #edbc53}.eds-c-header{background-color:#fff;border-bottom:2px solid #01324b;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:1rem;line-height:1.5;padding:8px 0 0}.eds-c-header__container{align-items:center;display:flex;flex-wrap:nowrap;gap:8px 16px;justify-content:space-between;margin:0 auto 8px;max-width:1280px;padding:0 8px;position:relative}.eds-c-header__nav{border-top:2px solid #c5e0f4;padding-top:4px;position:relative}.eds-c-header__nav-container{align-items:center;display:flex;flex-wrap:wrap;margin:0 auto 4px;max-width:1280px;padding:0 8px;position:relative}.eds-c-header__nav-container>:not(:last-child){margin-right:32px}.eds-c-header__link-container{align-items:center;display:flex;flex:1 0 auto;gap:8px 16px;justify-content:space-between}.eds-c-header__list{list-style:none;margin:0;padding:0}.eds-c-header__list-item{font-weight:700;margin:0 auto;max-width:1280px;padding:8px}.eds-c-header__list-item:not(:last-child){border-bottom:2px solid #c5e0f4}.eds-c-header__item{color:inherit}@media only screen and (min-width:768px){.eds-c-header__item--menu{display:none;visibility:hidden}.eds-c-header__item--menu:first-child+*{margin-block-start:0}}.eds-c-header__item--inline-links{display:none;visibility:hidden}@media only screen and (min-width:768px){.eds-c-header__item--inline-links{display:flex;gap:16px 16px;visibility:visible}}.eds-c-header__item--divider:before{border-left:2px solid #c5e0f4;content:"";height:calc(100% - 16px);margin-left:-15px;position:absolute;top:8px}.eds-c-header__brand{padding:16px 8px}.eds-c-header__brand a{display:block;line-height:1;text-decoration:none}.eds-c-header__brand img{height:1.5rem;width:auto}.eds-c-header__link{color:inherit;display:inline-block;font-weight:700;padding:16px 8px;position:relative;text-decoration-color:transparent;white-space:nowrap;word-break:normal}.eds-c-header__icon{fill:currentcolor;display:inline-block;font-size:1.5rem;height:1em;transform:translate(0);vertical-align:bottom;width:1em}.eds-c-header__icon+*{margin-left:8px}.eds-c-header__expander{background-color:#f0f7fc}.eds-c-header__search{display:block;padding:24px 0}@media only screen and (min-width:768px){.eds-c-header__search{max-width:70%}}.eds-c-header__search-container{position:relative}.eds-c-header__search-label{color:inherit;display:inline-block;font-weight:700;margin-bottom:8px}.eds-c-header__search-input{background-color:#fff;border:1px solid #000;padding:8px 48px 8px 8px;width:100%}.eds-c-header__search-button{background-color:transparent;border:0;color:inherit;height:100%;padding:0 8px;position:absolute;right:0}.has-tethered.eds-c-header__expander{border-bottom:2px solid #01324b;left:0;margin-top:-2px;top:100%;width:100%;z-index:10}@media only screen and (min-width:768px){.has-tethered.eds-c-header__expander--menu{display:none;visibility:hidden}}.has-tethered .eds-c-header__heading{display:none;visibility:hidden}.has-tethered .eds-c-header__heading:first-child+*{margin-block-start:0}.has-tethered .eds-c-header__search{margin:auto}.eds-c-header__heading{margin:0 auto;max-width:1280px;padding:16px 16px 0}.eds-c-pagination{align-items:center;display:flex;flex-wrap:wrap;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:.875rem;gap:16px 0;justify-content:center;line-height:1.4;list-style:none;margin:0;padding:32px 0}@media only screen and (min-width:480px){.eds-c-pagination{padding:32px 16px}}.eds-c-pagination__item{margin-right:8px}.eds-c-pagination__item--prev{margin-right:16px}.eds-c-pagination__item--next .eds-c-pagination__link,.eds-c-pagination__item--prev .eds-c-pagination__link{padding:16px 8px}.eds-c-pagination__item--next{margin-left:8px}.eds-c-pagination__item:last-child{margin-right:0}.eds-c-pagination__link{align-items:center;color:#222;cursor:pointer;display:inline-block;font-size:1rem;margin:0;padding:16px 24px;position:relative;text-align:center;transition:all .2s ease 0s}.eds-c-pagination__link:visited{color:#222}.eds-c-pagination__link--disabled{border-color:#555;color:#555;cursor:default}.eds-c-pagination__link--active{background-color:#01324b;background-image:none;border-radius:8px;color:#fff}.eds-c-pagination__link--active:focus,.eds-c-pagination__link--active:hover,.eds-c-pagination__link--active:visited{color:#fff}.eds-c-pagination__link-container{align-items:center;display:flex}.eds-c-pagination__icon{fill:#222;height:1.5rem;width:1.5rem}.eds-c-pagination__icon--disabled{fill:#555}.eds-c-pagination__visually-hidden{clip:rect(0,0,0,0);border:0;clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute!important;white-space:nowrap;width:1px}.c-breadcrumbs{color:#333;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:1rem;list-style:none;margin:0;padding:0}.c-breadcrumbs>li{display:inline}svg.c-breadcrumbs__chevron{fill:#333;height:10px;margin:0 .25rem;width:10px}.c-breadcrumbs--contrast,.c-breadcrumbs--contrast .c-breadcrumbs__link{color:#fff}.c-breadcrumbs--contrast svg.c-breadcrumbs__chevron{fill:#fff}@media only screen and (max-width:479px){.c-breadcrumbs .c-breadcrumbs__item{display:none}.c-breadcrumbs .c-breadcrumbs__item:last-child,.c-breadcrumbs .c-breadcrumbs__item:nth-last-child(2){display:inline}}.c-skip-link{background:#01324b;bottom:auto;color:#fff;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:1rem;padding:8px;position:absolute;text-align:center;transform:translateY(-100%);width:100%;z-index:9999}@media (prefers-reduced-motion:reduce){.c-skip-link{transition:top .3s ease-in-out 0s}}@media print{.c-skip-link{display:none}}.c-skip-link:active,.c-skip-link:hover,.c-skip-link:link,.c-skip-link:visited{color:#fff}.c-skip-link:focus{transform:translateY(0)}.l-with-sidebar{display:flex;flex-wrap:wrap}.l-with-sidebar>*{margin:0}.l-with-sidebar__sidebar{flex-basis:var(--with-sidebar--basis,400px);flex-grow:1}.l-with-sidebar>:not(.l-with-sidebar__sidebar){flex-basis:0px;flex-grow:999;min-width:var(--with-sidebar--min,53%)}.l-with-sidebar>:first-child{padding-right:4rem}@supports (gap:1em){.l-with-sidebar>:first-child{padding-right:0}.l-with-sidebar{gap:var(--with-sidebar--gap,4rem)}}.c-header__link{color:inherit;display:inline-block;font-weight:700;padding:16px 8px;position:relative;text-decoration-color:transparent;white-space:nowrap;word-break:normal}.app-masthead__colour-4{--background-color:#ff9500;--gradient-light:rgba(0,0,0,.5);--gradient-dark:rgba(0,0,0,.8)}.app-masthead{background:var(--background-color,#0070a8);position:relative}.app-masthead:after{background:radial-gradient(circle at top right,var(--gradient-light,rgba(0,0,0,.4)),var(--gradient-dark,rgba(0,0,0,.7)));bottom:0;content:"";left:0;position:absolute;right:0;top:0}@media only screen and (max-width:479px){.app-masthead:after{background:linear-gradient(225deg,var(--gradient-light,rgba(0,0,0,.4)),var(--gradient-dark,rgba(0,0,0,.7)))}}.app-masthead__container{color:var(--masthead-color,#fff);margin:0 auto;max-width:1280px;padding:0 16px;position:relative;z-index:1}.u-button{align-items:center;background-color:#01324b;background-image:none;border:4px solid transparent;border-radius:32px;cursor:pointer;display:inline-flex;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:.875rem;font-weight:700;justify-content:center;line-height:1.3;margin:0;padding:16px 32px;position:relative;transition:all .2s ease 0s;width:auto}.u-button svg,.u-button--contrast svg,.u-button--primary svg,.u-button--secondary svg,.u-button--tertiary svg{fill:currentcolor}.u-button,.u-button:visited{color:#fff}.u-button,.u-button:hover{box-shadow:0 0 0 1px #01324b;text-decoration:none}.u-button:hover{border:4px solid #fff}.u-button:focus{border:4px solid #fc0;box-shadow:none;outline:0;text-decoration:none}.u-button:focus,.u-button:hover{background-color:#fff;background-image:none;color:#01324b}.app-masthead--pastel .c-pdf-download .u-button--primary:focus svg path,.app-masthead--pastel .c-pdf-download .u-button--primary:hover svg path,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:focus svg path,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:hover svg path,.u-button--primary:focus svg path,.u-button--primary:hover svg path,.u-button:focus svg path,.u-button:hover svg path{fill:#01324b}.u-button--primary{background-color:#01324b;background-image:none;border:4px solid transparent;box-shadow:0 0 0 1px #01324b;color:#fff;font-weight:700}.u-button--primary:visited{color:#fff}.u-button--primary:hover{border:4px solid #fff;box-shadow:0 0 0 1px #01324b;text-decoration:none}.u-button--primary:focus{border:4px solid #fc0;box-shadow:none;outline:0;text-decoration:none}.u-button--primary:focus,.u-button--primary:hover{background-color:#fff;background-image:none;color:#01324b}.u-button--secondary{background-color:#fff;border:4px solid #fff;color:#01324b;font-weight:700}.u-button--secondary:visited{color:#01324b}.u-button--secondary:hover{border:4px solid #01324b;box-shadow:none}.u-button--secondary:focus,.u-button--secondary:hover{background-color:#01324b;color:#fff}.app-masthead--pastel .c-pdf-download .u-button--secondary:focus svg path,.app-masthead--pastel .c-pdf-download .u-button--secondary:hover svg path,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary:focus svg path,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary:hover svg path,.u-button--secondary:focus svg path,.u-button--secondary:hover svg path,.u-button--tertiary:focus svg path,.u-button--tertiary:hover svg path{fill:#fff}.u-button--tertiary{background-color:#ebf1f5;border:4px solid transparent;box-shadow:none;color:#666;font-weight:700}.u-button--tertiary:visited{color:#666}.u-button--tertiary:hover{border:4px solid #01324b;box-shadow:none}.u-button--tertiary:focus,.u-button--tertiary:hover{background-color:#01324b;color:#fff}.u-button--contrast{background-color:transparent;background-image:none;color:#fff;font-weight:400}.u-button--contrast:visited{color:#fff}.u-button--contrast,.u-button--contrast:focus,.u-button--contrast:hover{border:4px solid #fff}.u-button--contrast:focus,.u-button--contrast:hover{background-color:#fff;background-image:none;color:#000}.u-button--contrast:focus svg path,.u-button--contrast:hover svg path{fill:#000}.u-button--disabled,.u-button:disabled{background-color:transparent;background-image:none;border:4px solid #ccc;color:#000;cursor:default;font-weight:400;opacity:.7}.u-button--disabled svg,.u-button:disabled svg{fill:currentcolor}.u-button--disabled:visited,.u-button:disabled:visited{color:#000}.u-button--disabled:focus,.u-button--disabled:hover,.u-button:disabled:focus,.u-button:disabled:hover{border:4px solid #ccc;text-decoration:none}.u-button--disabled:focus,.u-button--disabled:hover,.u-button:disabled:focus,.u-button:disabled:hover{background-color:transparent;background-image:none;color:#000}.u-button--disabled:focus svg path,.u-button--disabled:hover svg path,.u-button:disabled:focus svg path,.u-button:disabled:hover svg path{fill:#000}.u-button--small,.u-button--xsmall{font-size:.875rem;padding:2px 8px}.u-button--small{padding:8px 16px}.u-button--large{font-size:1.125rem;padding:10px 35px}.u-button--full-width{display:flex;width:100%}.u-button--icon-left svg{margin-right:8px}.u-button--icon-right svg{margin-left:8px}.u-clear-both{clear:both}.u-container{margin:0 auto;max-width:1280px;padding:0 16px}.u-justify-content-space-between{justify-content:space-between}.u-display-none{display:none}.js .u-js-hide,.u-hide{display:none;visibility:hidden}.u-visually-hidden{clip:rect(0,0,0,0);border:0;clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute!important;white-space:nowrap;width:1px}.u-icon{fill:currentcolor;display:inline-block;height:1em;transform:translate(0);vertical-align:text-top;width:1em}.u-list-reset{list-style:none;margin:0;padding:0}.u-ma-16{margin:16px}.u-mt-0{margin-top:0}.u-mt-24{margin-top:24px}.u-mt-32{margin-top:32px}.u-mb-8{margin-bottom:8px}.u-mb-32{margin-bottom:32px}.u-button-reset{background-color:transparent;border:0;padding:0}.u-sans-serif{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.u-serif{font-family:Merriweather,serif}h1,h2,h4{-webkit-font-smoothing:antialiased}p{overflow-wrap:break-word;word-break:break-word}.u-h4{font-size:1.25rem;font-weight:700;line-height:1.2}.u-mbs-0{margin-block-start:0!important}.c-article-header{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.c-article-identifiers{color:#6f6f6f;display:flex;flex-wrap:wrap;font-size:1rem;line-height:1.3;list-style:none;margin:0 0 8px;padding:0}.c-article-identifiers__item{border-right:1px solid #6f6f6f;list-style:none;margin-right:8px;padding-right:8px}.c-article-identifiers__item:last-child{border-right:0;margin-right:0;padding-right:0}@media only screen and (min-width:876px){.c-article-title{font-size:1.875rem;line-height:1.2}}.c-article-author-list{display:inline;font-size:1rem;list-style:none;margin:0 8px 0 0;padding:0;width:100%}.c-article-author-list__item{display:inline;padding-right:0}.c-article-author-list__show-more{display:none;margin-right:4px}.c-article-author-list__button,.js .c-article-author-list__item--hide,.js .c-article-author-list__show-more{display:none}.js .c-article-author-list--long .c-article-author-list__show-more,.js .c-article-author-list--long+.c-article-author-list__button{display:inline}@media only screen and (max-width:767px){.js .c-article-author-list__item--hide-small-screen{display:none}.js .c-article-author-list--short .c-article-author-list__show-more,.js .c-article-author-list--short+.c-article-author-list__button{display:inline}}#uptodate-client,.js .c-article-author-list--expanded .c-article-author-list__show-more{display:none!important}.js .c-article-author-list--expanded .c-article-author-list__item--hide-small-screen{display:inline!important}.c-article-author-list__button,.c-button-author-list{background:#ebf1f5;border:4px solid #ebf1f5;border-radius:20px;color:#666;font-size:.875rem;line-height:1.4;padding:2px 11px 2px 8px;text-decoration:none}.c-article-author-list__button svg,.c-button-author-list svg{margin:1px 4px 0 0}.c-article-author-list__button:hover,.c-button-author-list:hover{background:#025e8d;border-color:transparent;color:#fff}.c-article-body .c-article-access-provider{padding:8px 16px}.c-article-body .c-article-access-provider,.c-notes{border:1px solid #d5d5d5;border-image:initial;border-left:none;border-right:none;margin:24px 0}.c-article-body .c-article-access-provider__text{color:#555}.c-article-body .c-article-access-provider__text,.c-notes__text{font-size:1rem;margin-bottom:0;padding-bottom:2px;padding-top:2px;text-align:center}.c-article-body .c-article-author-affiliation__address{color:inherit;font-weight:700;margin:0}.c-article-body .c-article-author-affiliation__authors-list{list-style:none;margin:0;padding:0}.c-article-body .c-article-author-affiliation__authors-item{display:inline;margin-left:0}.c-article-authors-search{margin-bottom:24px;margin-top:0}.c-article-authors-search__item,.c-article-authors-search__title{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.c-article-authors-search__title{color:#626262;font-size:1.05rem;font-weight:700;margin:0;padding:0}.c-article-authors-search__item{font-size:1rem}.c-article-authors-search__text{margin:0}.c-code-block{border:1px solid #fff;font-family:monospace;margin:0 0 24px;padding:20px}.c-code-block__heading{font-weight:400;margin-bottom:16px}.c-code-block__line{display:block;overflow-wrap:break-word;white-space:pre-wrap}.c-article-share-box{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;margin-bottom:24px}.c-article-share-box__description{font-size:1rem;margin-bottom:8px}.c-article-share-box__no-sharelink-info{font-size:.813rem;font-weight:700;margin-bottom:24px;padding-top:4px}.c-article-share-box__only-read-input{border:1px solid #d5d5d5;box-sizing:content-box;display:inline-block;font-size:.875rem;font-weight:700;height:24px;margin-bottom:8px;padding:8px 10px}.c-article-share-box__additional-info{color:#626262;font-size:.813rem}.c-article-share-box__button{background:#fff;box-sizing:content-box;text-align:center}.c-article-share-box__button--link-like{background-color:transparent;border:0;color:#025e8d;cursor:pointer;font-size:.875rem;margin-bottom:8px;margin-left:10px}.c-article-associated-content__container .c-article-associated-content__collection-label{font-size:.875rem;line-height:1.4}.c-article-associated-content__container .c-article-associated-content__collection-title{line-height:1.3}.c-reading-companion{clear:both;min-height:389px}.c-reading-companion__figures-list,.c-reading-companion__references-list{list-style:none;min-height:389px;padding:0}.c-reading-companion__references-list--numeric{list-style:decimal inside}.c-reading-companion__figure-item{border-top:1px solid #d5d5d5;font-size:1rem;padding:16px 8px 16px 0}.c-reading-companion__figure-item:first-child{border-top:none;padding-top:8px}.c-reading-companion__reference-item{font-size:1rem}.c-reading-companion__reference-item:first-child{border-top:none}.c-reading-companion__reference-item a{word-break:break-word}.c-reading-companion__reference-citation{display:inline}.c-reading-companion__reference-links{font-size:.813rem;font-weight:700;list-style:none;margin:8px 0 0;padding:0;text-align:right}.c-reading-companion__reference-links>a{display:inline-block;padding-left:8px}.c-reading-companion__reference-links>a:first-child{display:inline-block;padding-left:0}.c-reading-companion__figure-title{display:block;font-size:1.25rem;font-weight:700;line-height:1.2;margin:0 0 8px}.c-reading-companion__figure-links{display:flex;justify-content:space-between;margin:8px 0 0}.c-reading-companion__figure-links>a{align-items:center;display:flex}.c-article-section__figure-caption{display:block;margin-bottom:8px;word-break:break-word}.c-article-section__figure .video,p.app-article-masthead__access--above-download{margin:0 0 16px}.c-article-section__figure-description{font-size:1rem}.c-article-section__figure-description>*{margin-bottom:0}.c-cod{display:block;font-size:1rem;width:100%}.c-cod__form{background:#ebf0f3}.c-cod__prompt{font-size:1.125rem;line-height:1.3;margin:0 0 24px}.c-cod__label{display:block;margin:0 0 4px}.c-cod__row{display:flex;margin:0 0 16px}.c-cod__row:last-child{margin:0}.c-cod__input{border:1px solid #d5d5d5;border-radius:2px;flex-shrink:0;margin:0;padding:13px}.c-cod__input--submit{background-color:#025e8d;border:1px solid #025e8d;color:#fff;flex-shrink:1;margin-left:8px;transition:background-color .2s ease-out 0s,color .2s ease-out 0s}.c-cod__input--submit-single{flex-basis:100%;flex-shrink:0;margin:0}.c-cod__input--submit:focus,.c-cod__input--submit:hover{background-color:#fff;color:#025e8d}.save-data .c-article-author-institutional-author__sub-division,.save-data .c-article-equation__number,.save-data .c-article-figure-description,.save-data .c-article-fullwidth-content,.save-data .c-article-main-column,.save-data .c-article-satellite-article-link,.save-data .c-article-satellite-subtitle,.save-data .c-article-table-container,.save-data .c-blockquote__body,.save-data .c-code-block__heading,.save-data .c-reading-companion__figure-title,.save-data .c-reading-companion__reference-citation,.save-data .c-site-messages--nature-briefing-email-variant .serif,.save-data .c-site-messages--nature-briefing-email-variant.serif,.save-data .serif,.save-data .u-serif,.save-data h1,.save-data h2,.save-data h3{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.c-pdf-download__link{display:flex;flex:1 1 0%;padding:13px 24px}.c-pdf-download__link:hover{text-decoration:none}@media only screen and (min-width:768px){.c-context-bar--sticky .c-pdf-download__link{align-items:center;flex:1 1 183px}}@media only screen and (max-width:320px){.c-context-bar--sticky .c-pdf-download__link{padding:16px}}.c-article-body .c-article-recommendations-list,.c-book-body .c-article-recommendations-list{display:flex;flex-direction:row;gap:16px 16px;margin:0;max-width:100%;padding:16px 0 0}.c-article-body .c-article-recommendations-list__item,.c-book-body .c-article-recommendations-list__item{flex:1 1 0%}@media only screen and (max-width:767px){.c-article-body .c-article-recommendations-list,.c-book-body .c-article-recommendations-list{flex-direction:column}}.c-article-body .c-article-recommendations-card__authors{display:none;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:.875rem;line-height:1.5;margin:0 0 8px}@media only screen and (max-width:767px){.c-article-body .c-article-recommendations-card__authors{display:block;margin:0}}.c-article-body .c-article-history{margin-top:24px}.app-article-metrics-bar p{margin:0}.app-article-masthead{display:flex;flex-direction:column;gap:16px 16px;padding:16px 0 24px}.app-article-masthead__info{display:flex;flex-direction:column;flex-grow:1}.app-article-masthead__brand{border-top:1px solid hsla(0,0%,100%,.8);display:flex;flex-direction:column;flex-shrink:0;gap:8px 8px;min-height:96px;padding:16px 0 0}.app-article-masthead__brand img{border:1px solid #fff;border-radius:8px;box-shadow:0 4px 15px 0 hsla(0,0%,50%,.25);height:auto;left:0;position:absolute;width:72px}.app-article-masthead__journal-link{display:block;font-size:1.125rem;font-weight:700;margin:0 0 8px;max-width:400px;padding:0 0 0 88px;position:relative}.app-article-masthead__journal-title{-webkit-box-orient:vertical;-webkit-line-clamp:3;display:-webkit-box;overflow:hidden}.app-article-masthead__submission-link{align-items:center;display:flex;font-size:1rem;gap:4px 4px;margin:0 0 0 88px}.app-article-masthead__access{align-items:center;display:flex;flex-wrap:wrap;font-size:.875rem;font-weight:300;gap:4px 4px;margin:0}.app-article-masthead__buttons{display:flex;flex-flow:column wrap;gap:16px 16px}.app-article-masthead__access svg,.app-masthead--pastel .c-pdf-download .u-button--primary svg,.app-masthead--pastel .c-pdf-download .u-button--secondary svg,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary svg,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary svg{fill:currentcolor}.app-article-masthead a{color:#fff}.app-masthead--pastel .c-pdf-download .u-button--primary,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary{background-color:#025e8d;background-image:none;border:2px solid transparent;box-shadow:none;color:#fff;font-weight:700}.app-masthead--pastel .c-pdf-download .u-button--primary:visited,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:visited{color:#fff}.app-masthead--pastel .c-pdf-download .u-button--primary:hover,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:hover{text-decoration:none}.app-masthead--pastel .c-pdf-download .u-button--primary:focus,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:focus{border:4px solid #fc0;box-shadow:none;outline:0;text-decoration:none}.app-masthead--pastel .c-pdf-download .u-button--primary:focus,.app-masthead--pastel .c-pdf-download .u-button--primary:hover,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:focus,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:hover{background-color:#fff;background-image:none;color:#01324b}.app-masthead--pastel .c-pdf-download .u-button--primary:hover,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--primary:hover{background:0 0;border:2px solid #025e8d;box-shadow:none;color:#025e8d}.app-masthead--pastel .c-pdf-download .u-button--secondary,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary{background:0 0;border:2px solid #025e8d;color:#025e8d;font-weight:700}.app-masthead--pastel .c-pdf-download .u-button--secondary:visited,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary:visited{color:#01324b}.app-masthead--pastel .c-pdf-download .u-button--secondary:hover,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary:hover{background-color:#01324b;background-color:#025e8d;border:2px solid transparent;box-shadow:none;color:#fff}.app-masthead--pastel .c-pdf-download .u-button--secondary:focus,.c-context-bar--sticky .c-context-bar__container .c-pdf-download .u-button--secondary:focus{background-color:#fff;background-image:none;border:4px solid #fc0;color:#01324b}@media only screen and (min-width:768px){.app-article-masthead{flex-direction:row;gap:64px 64px;padding:24px 0}.app-article-masthead__brand{border:0;padding:0}.app-article-masthead__brand img{height:auto;position:static;width:auto}.app-article-masthead__buttons{align-items:center;flex-direction:row;margin-top:auto}.app-article-masthead__journal-link{display:flex;flex-direction:column;gap:24px 24px;margin:0 0 8px;padding:0}.app-article-masthead__submission-link{margin:0}}@media only screen and (min-width:1024px){.app-article-masthead__brand{flex-basis:400px}}.app-article-masthead .c-article-identifiers{font-size:.875rem;font-weight:300;line-height:1;margin:0 0 8px;overflow:hidden;padding:0}.app-article-masthead .c-article-identifiers--cite-list{margin:0 0 16px}.app-article-masthead .c-article-identifiers *{color:#fff}.app-article-masthead .c-cod{display:none}.app-article-masthead .c-article-identifiers__item{border-left:1px solid #fff;border-right:0;margin:0 17px 8px -9px;padding:0 0 0 8px}.app-article-masthead .c-article-identifiers__item--cite{border-left:0}.app-article-metrics-bar{display:flex;flex-wrap:wrap;font-size:1rem;padding:16px 0 0;row-gap:24px}.app-article-metrics-bar__item{padding:0 16px 0 0}.app-article-metrics-bar__count{font-weight:700}.app-article-metrics-bar__label{font-weight:400;padding-left:4px}.app-article-metrics-bar__icon{height:auto;margin-right:4px;margin-top:-4px;width:auto}.app-article-metrics-bar__arrow-icon{margin:4px 0 0 4px}.app-article-metrics-bar a{color:#000}.app-article-metrics-bar .app-article-metrics-bar__item--metrics{padding-right:0}.app-overview-section .c-article-author-list,.app-overview-section__authors{line-height:2}.app-article-metrics-bar{margin-top:8px}.c-book-toc-pagination+.c-book-section__back-to-top{margin-top:0}.c-article-body .c-article-access-provider__text--chapter{color:#222;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;padding:20px 0}.c-article-body .c-article-access-provider__text--chapter svg.c-status-message__icon{fill:#003f8d;vertical-align:middle}.c-article-body-section__content--separator{padding-top:40px}.c-pdf-download__link{max-height:44px}.app-article-access .u-button--primary,.app-article-access .u-button--primary:visited{color:#fff}.c-article-sidebar{display:none}@media only screen and (min-width:1024px){.c-article-sidebar{display:block}}.c-cod__form{border-radius:12px}.c-cod__label{font-size:.875rem}.c-cod .c-status-message{align-items:center;justify-content:center;margin-bottom:16px;padding-bottom:16px}@media only screen and (min-width:1024px){.c-cod .c-status-message{align-items:inherit}}.c-cod .c-status-message__icon{margin-top:4px}.c-cod .c-cod__prompt{font-size:1rem;margin-bottom:16px}.c-article-body .app-article-access,.c-book-body .app-article-access{display:block}@media only screen and (min-width:1024px){.c-article-body .app-article-access,.c-book-body .app-article-access{display:none}}.c-article-body .app-card-service{margin-bottom:32px}@media only screen and (min-width:1024px){.c-article-body .app-card-service{display:none}}.app-article-access .buybox__buy .u-button--secondary,.app-article-access .u-button--primary,.c-cod__row .u-button--primary{background-color:#025e8d;border:2px solid #025e8d;box-shadow:none;font-size:1rem;font-weight:700;gap:8px 8px;justify-content:center;line-height:1.5;padding:8px 24px}.app-article-access .buybox__buy .u-button--secondary,.app-article-access .u-button--primary:hover,.c-cod__row .u-button--primary:hover{background-color:#fff;color:#025e8d}.app-article-access .buybox__buy .u-button--secondary:hover{background-color:#025e8d;color:#fff}.buybox__buy .c-notes__text{color:#666;font-size:.875rem;padding:0 16px 8px}.c-cod__input{flex-basis:auto;width:100%}.c-article-title{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:2.25rem;font-weight:700;line-height:1.2;margin:12px 0}.c-reading-companion__figure-item figure{margin:0}@media only screen and (min-width:768px){.c-article-title{margin:16px 0}}.app-article-access{border:1px solid #c5e0f4;border-radius:12px}.app-article-access__heading{border-bottom:1px solid #c5e0f4;font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:1.125rem;font-weight:700;margin:0;padding:16px;text-align:center}.app-article-access .buybox__info svg{vertical-align:middle}.c-article-body .app-article-access p{margin-bottom:0}.app-article-access .buybox__info{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:1rem;margin:0}.app-article-access{margin:0 0 32px}@media only screen and (min-width:1024px){.app-article-access{margin:0 0 24px}}.c-status-message{font-size:1rem}.c-article-body{font-size:1.125rem}.c-article-body dl,.c-article-body ol,.c-article-body p,.c-article-body ul{margin-bottom:32px;margin-top:0}.c-article-access-provider__text:last-of-type,.c-article-body .c-notes__text:last-of-type{margin-bottom:0}.c-article-body ol p,.c-article-body ul p{margin-bottom:16px}.c-article-section__figure-caption{font-family:Merriweather Sans,Helvetica Neue,Helvetica,Arial,sans-serif}.c-reading-companion__figure-item{border-top-color:#c5e0f4}.c-reading-companion__sticky{max-width:400px}.c-article-section .c-article-section__figure-description>*{font-size:1rem;margin-bottom:16px}.c-reading-companion__reference-item{border-top:1px solid #d5d5d5;padding:16px 0}.c-reading-companion__reference-item:first-child{padding-top:0}.c-article-share-box__button,.js .c-article-authors-search__item .c-article-button{background:0 0;border:2px solid #025e8d;border-radius:32px;box-shadow:none;color:#025e8d;font-size:1rem;font-weight:700;line-height:1.5;margin:0;padding:8px 24px;transition:all .2s ease 0s}.c-article-authors-search__item .c-article-button{width:100%}.c-pdf-download .u-button{background-color:#fff;border:2px solid #fff;color:#01324b;justify-content:center}.c-context-bar__container .c-pdf-download .u-button svg,.c-pdf-download .u-button svg{fill:currentcolor}.c-pdf-download .u-button:visited{color:#01324b}.c-pdf-download .u-button:hover{border:4px solid #01324b;box-shadow:none}.c-pdf-download .u-button:focus,.c-pdf-download .u-button:hover{background-color:#01324b}.c-pdf-download .u-button:focus svg path,.c-pdf-download .u-button:hover svg path{fill:#fff}.c-context-bar__container .c-pdf-download .u-button{background-image:none;border:2px solid;color:#fff}.c-context-bar__container .c-pdf-download .u-button:visited{color:#fff}.c-context-bar__container .c-pdf-download .u-button:hover{text-decoration:none}.c-context-bar__container .c-pdf-download .u-button:focus{box-shadow:none;outline:0;text-decoration:none}.c-context-bar__container .c-pdf-download .u-button:focus,.c-context-bar__container .c-pdf-download .u-button:hover{background-color:#fff;background-image:none;color:#01324b}.c-context-bar__container .c-pdf-download .u-button:focus svg path,.c-context-bar__container .c-pdf-download .u-button:hover svg path{fill:#01324b}.c-context-bar__container .c-pdf-download .u-button,.c-pdf-download .u-button{box-shadow:none;font-size:1rem;font-weight:700;line-height:1.5;padding:8px 24px}.c-context-bar__container .c-pdf-download .u-button{background-color:#025e8d}.c-pdf-download .u-button:hover{border:2px solid #fff}.c-pdf-download .u-button:focus,.c-pdf-download .u-button:hover{background:0 0;box-shadow:none;color:#fff}.c-context-bar__container .c-pdf-download .u-button:hover{border:2px solid #025e8d;box-shadow:none;color:#025e8d}.c-context-bar__container .c-pdf-download .u-button:focus,.c-pdf-download .u-button:focus{border:2px solid #025e8d}.c-article-share-box__button:focus:focus,.c-article__pill-button:focus:focus,.c-context-bar__container .c-pdf-download .u-button:focus:focus,.c-pdf-download .u-button:focus:focus{outline:3px solid #08c;will-change:transform}.c-pdf-download__link .u-icon{padding-top:0}.c-bibliographic-information__column button{margin-bottom:16px}.c-article-body .c-article-author-affiliation__list p,.c-article-body .c-article-author-information__list p,figure{margin:0}.c-article-share-box__button{margin-right:16px}.c-status-message--boxed{border-radius:12px}.c-article-associated-content__collection-title{font-size:1rem}.app-card-service__description,.c-article-body .app-card-service__description{color:#222;margin-bottom:0;margin-top:8px}.app-article-access__subscriptions a,.app-article-access__subscriptions a:visited,.app-book-series-listing__item a,.app-book-series-listing__item a:hover,.app-book-series-listing__item a:visited,.c-article-author-list a,.c-article-author-list a:visited,.c-article-buy-box a,.c-article-buy-box a:visited,.c-article-peer-review a,.c-article-peer-review a:visited,.c-article-satellite-subtitle a,.c-article-satellite-subtitle a:visited,.c-breadcrumbs__link,.c-breadcrumbs__link:hover,.c-breadcrumbs__link:visited{color:#000}.c-article-author-list svg{height:24px;margin:0 0 0 6px;width:24px}.c-article-header{margin-bottom:32px}@media only screen and (min-width:876px){.js .c-ad--conditional{display:block}}.u-lazy-ad-wrapper{background-color:#fff;display:none;min-height:149px}@media only screen and (min-width:876px){.u-lazy-ad-wrapper{display:block}}p.c-ad__label{margin-bottom:4px}.c-ad--728x90{background-color:#fff;border-bottom:2px solid #cedbe0} } </style> <style>@media only print, only all and (prefers-color-scheme: no-preference), only all and (prefers-color-scheme: light), only all and (prefers-color-scheme: dark) { .eds-c-header__brand img{height:24px;width:203px}.app-article-masthead__journal-link img{height:93px;width:72px}@media only screen and (min-width:769px){.app-article-masthead__journal-link img{height:161px;width:122px}} } </style> <link rel="stylesheet" data-test="critical-css-handler" data-inline-css-source="critical-css" href=/oscar-static/app-springerlink/css/core-darwin-3c86549cfc.css media="print" onload="this.media='all';this.onload=null"> <link rel="stylesheet" data-test="critical-css-handler" data-inline-css-source="critical-css" href="/oscar-static/app-springerlink/css/enhanced-darwin-article-72ba046d97.css" media="print" onload="this.media='only print, only all and (prefers-color-scheme: no-preference), only all and (prefers-color-scheme: light), only all and (prefers-color-scheme: dark)';this.onload=null"> <script type="text/javascript"> config = { env: 'live', site: '11120.springer.com', siteWithPath: '11120.springer.com' + window.location.pathname, twitterHashtag: '11120', cmsPrefix: 'https://studio-cms.springernature.com/studio/', publisherBrand: 'Springer', mustardcut: false }; </script> <script> window.dataLayer = [{"GA Key":"UA-26408784-1","DOI":"10.1023/B:PRES.0000030657.88242.e1","Page":"article","springerJournal":true,"Publishing Model":"Hybrid Access","page":{"attributes":{"environment":"live"}},"Country":"HK","japan":false,"doi":"10.1023-B:PRES.0000030657.88242.e1","Journal Id":11120,"Journal Title":"Photosynthesis Research","Keywords":"Hervé Bottin, Klaus Brettel, crystal structure, crystallization, electron transfer, Petra Fromme, Olaf Klukas, Norbert Krauß, Bernard Lagoutte, light harvesting, Paul Mathis, membrane protein, microgravity, photosynthesis, Photosystem I, Bill Rutherford, Wolfram Saenger, Wolf-Dieter Schubert, Pierre Sétif, space shuttle, Horst T. Witt, X-ray crystallography","kwrd":["Hervé_Bottin","Klaus_Brettel","crystal_structure","crystallization","electron_transfer","Petra_Fromme","Olaf_Klukas","Norbert_Krauß","Bernard_Lagoutte","light_harvesting","Paul_Mathis","membrane_protein","microgravity","photosynthesis","Photosystem_I","Bill_Rutherford","Wolfram_Saenger","Wolf-Dieter_Schubert","Pierre_Sétif","space_shuttle","Horst_T._Witt","X-ray_crystallography"],"Labs":"Y","ksg":"Krux.segments","kuid":"Krux.uid","Has Body":"N","Features":[],"Open Access":"N","hasAccess":"N","bypassPaywall":"N","user":{"license":{"businessPartnerID":[],"businessPartnerIDString":""}},"Access Type":"no-access","Bpids":"","Bpnames":"","BPID":["1"],"VG Wort Identifier":"pw-vgzm.415900-10.1023-B-PRES.0000030657.88242.e1","Full HTML":"N","Subject Codes":["SCL","SCL24000","SCL33020","SCL14005","SCL32020"],"pmc":["L","L24000","L33020","L14005","L32020"],"session":{"authentication":{"loginStatus":"N"},"attributes":{"edition":"academic"}},"content":{"serial":{"eissn":"1573-5079","pissn":"0166-8595"},"type":"Article","category":{"pmc":{"primarySubject":"Life Sciences","primarySubjectCode":"L","secondarySubjects":{"1":"Plant Sciences","2":"Plant Physiology","3":"Biochemistry, general","4":"Plant Genetics and Genomics"},"secondarySubjectCodes":{"1":"L24000","2":"L33020","3":"L14005","4":"L32020"}},"sucode":"SC3","articleType":"Article"},"attributes":{"deliveryPlatform":"oscar"}},"Event Category":"Article"}]; </script> <script data-test="springer-link-article-datalayer"> window.dataLayer = window.dataLayer || []; window.dataLayer.push({ ga4MeasurementId: 'G-B3E4QL2TPR', ga360TrackingId: 'UA-26408784-1', twitterId: 'o47a7', baiduId: 'aef3043f025ccf2305af8a194652d70b', ga4ServerUrl: 'https://collect.springer.com', imprint: 'springerlink', page: { attributes:{ featureFlags: [{ name: 'darwin-orion', active: true }, { name: 'chapter-books-recs', active: true } ], darwinAvailable: true } } }); </script> <script> (function(w, d) { w.config = w.config || {}; w.config.mustardcut = false; if (w.matchMedia && w.matchMedia('only print, only all and (prefers-color-scheme: no-preference), only all and (prefers-color-scheme: light), only all and (prefers-color-scheme: dark)').matches) { w.config.mustardcut = true; d.classList.add('js'); d.classList.remove('grade-c'); d.classList.remove('no-js'); } })(window, document.documentElement); </script> <script class="js-entry"> if (window.config.mustardcut) { (function(w, d) { window.Component = {}; window.suppressShareButton = false; window.onArticlePage = true; var currentScript = d.currentScript || d.head.querySelector('script.js-entry'); function catchNoModuleSupport() { var scriptEl = d.createElement('script'); return (!('noModule' in scriptEl) && 'onbeforeload' in scriptEl) } var headScripts = [ {'src': '/oscar-static/js/polyfill-es5-bundle-572d4fec60.js', 'async': false} ]; var bodyScripts = [ {'src': '/oscar-static/js/global-article-es5-bundle-dad1690b0d.js', 'async': false, 'module': false}, {'src': '/oscar-static/js/global-article-es6-bundle-e7d03c4cb3.js', 'async': false, 'module': true} ]; function createScript(script) { var scriptEl = d.createElement('script'); scriptEl.src = script.src; scriptEl.async = script.async; if (script.module === true) { scriptEl.type = "module"; if (catchNoModuleSupport()) { scriptEl.src = ''; } } else if (script.module === false) { scriptEl.setAttribute('nomodule', true) } if (script.charset) { scriptEl.setAttribute('charset', script.charset); } return scriptEl; } for (var i = 0; i < headScripts.length; ++i) { var scriptEl = createScript(headScripts[i]); currentScript.parentNode.insertBefore(scriptEl, currentScript.nextSibling); } d.addEventListener('DOMContentLoaded', function() { for (var i = 0; i < bodyScripts.length; ++i) { var scriptEl = createScript(bodyScripts[i]); d.body.appendChild(scriptEl); } }); // Webfont repeat view var config = w.config; if (config && config.publisherBrand && sessionStorage.fontsLoaded === 'true') { d.documentElement.className += ' webfonts-loaded'; } })(window, document); } </script> <script data-src="https://cdn.optimizely.com/js/27195530232.js" data-cc-script="C03"></script> <script data-test="gtm-head"> window.initGTM = function() { if (window.config.mustardcut) { (function (w, d, s, l, i) { w[l] = w[l] || []; w[l].push({'gtm.start': new Date().getTime(), event: 'gtm.js'}); var f = d.getElementsByTagName(s)[0], j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : ''; j.async = true; j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i + dl; f.parentNode.insertBefore(j, f); })(window, document, 'script', 'dataLayer', 'GTM-MRVXSHQ'); } } </script> <script> (function (w, d, t) { function cc() { var h = w.location.hostname; var e = d.createElement(t), s = d.getElementsByTagName(t)[0]; if (h.indexOf('springer.com') > -1 && h.indexOf('biomedcentral.com') === -1 && h.indexOf('springeropen.com') === -1) { if (h.indexOf('link-qa.springer.com') > -1 || h.indexOf('test-www.springer.com') > -1) { e.src = 'https://cmp.springer.com/production_live/en/consent-bundle-17-52.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } else { e.src = 'https://cmp.springer.com/production_live/en/consent-bundle-17-52.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } } else if (h.indexOf('biomedcentral.com') > -1) { if (h.indexOf('biomedcentral.com.qa') > -1) { e.src = 'https://cmp.biomedcentral.com/production_live/en/consent-bundle-15-36.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } else { e.src = 'https://cmp.biomedcentral.com/production_live/en/consent-bundle-15-36.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } } else if (h.indexOf('springeropen.com') > -1) { if (h.indexOf('springeropen.com.qa') > -1) { e.src = 'https://cmp.springernature.com/production_live/en/consent-bundle-16-34.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } else { e.src = 'https://cmp.springernature.com/production_live/en/consent-bundle-16-34.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-MRVXSHQ')"); } } else if (h.indexOf('springernature.com') > -1) { if (h.indexOf('beta-qa.springernature.com') > -1) { e.src = 'https://cmp.springernature.com/production_live/en/consent-bundle-49-43.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-NK22KLS')"); } else { e.src = 'https://cmp.springernature.com/production_live/en/consent-bundle-49-43.js'; e.setAttribute('onload', "initGTM(window,document,'script','dataLayer','GTM-NK22KLS')"); } } else { e.src = '/oscar-static/js/cookie-consent-es5-bundle-cb57c2c98a.js'; e.setAttribute('data-consent', h); } s.insertAdjacentElement('afterend', e); } cc(); })(window, document, 'script'); </script> <link rel="canonical" href="https://link.springer.com/article/10.1023/B:PRES.0000030657.88242.e1"/> <script type="application/ld+json">{"mainEntity":{"headline":"Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts","description":"This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most complex membrane protein for which detailed structural and functional information is now available. This short historical review cannot cover all the work that has been carried out over more than 50 years, nor provide a deep insight into the structure and function of this protein complex. Instead, this review focuses on more personal views of some of the key discoveries, starting in the 1950s with the discovery of the existence of two photoreactions in oxygenic photosynthesis, and ending with the race towards an atomic structure of PS I.","datePublished":"","dateModified":"","pageStart":"109","pageEnd":"124","sameAs":"https://doi.org/10.1023/B:PRES.0000030657.88242.e1","keywords":["Hervé Bottin","Klaus Brettel","crystal structure","crystallization","electron transfer","Petra Fromme","Olaf Klukas","Norbert Krauß","Bernard Lagoutte","light harvesting","Paul Mathis","membrane protein","microgravity","photosynthesis","Photosystem I","Bill Rutherford","Wolfram Saenger","Wolf-Dieter Schubert","Pierre Sétif","space shuttle","Horst T. Witt","X-ray crystallography","Plant Sciences","Plant Physiology","Biochemistry","general","Plant Genetics and Genomics"],"image":[],"isPartOf":{"name":"Photosynthesis Research","issn":["1573-5079","0166-8595"],"volumeNumber":"80","@type":["Periodical","PublicationVolume"]},"publisher":{"name":"Kluwer Academic Publishers","logo":{"url":"https://www.springernature.com/app-sn/public/images/logo-springernature.png","@type":"ImageObject"},"@type":"Organization"},"author":[{"name":"Petra Fromme","affiliation":[{"name":"Arizona State University","address":{"name":"Department of Chemistry and Biochemistry, Arizona State University, Tempe, USA","@type":"PostalAddress"},"@type":"Organization"}],"@type":"Person"},{"name":"Paul Mathis","affiliation":[{"name":"Section de Bioénergétique","address":{"name":"Département de Biologie Cellulaire et Moléculaire CEA Saclay, Section de Bioénergétique, Gif-sur-Yvette, Cedex, France","@type":"PostalAddress"},"@type":"Organization"}],"@type":"Person"}],"isAccessibleForFree":false,"hasPart":{"isAccessibleForFree":false,"cssSelector":".main-content","@type":"WebPageElement"},"@type":"ScholarlyArticle"},"@context":"https://schema.org","@type":"WebPage"}</script> </head> <body class="" > <!-- Google Tag Manager (noscript) --> <noscript> <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MRVXSHQ" height="0" width="0" style="display:none;visibility:hidden"></iframe> </noscript> <!-- End Google Tag Manager (noscript) --> <!-- Google Tag Manager (noscript) --> <noscript data-test="gtm-body"> <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MRVXSHQ" height="0" width="0" style="display:none;visibility:hidden"></iframe> </noscript> <!-- End Google Tag Manager (noscript) --> <div class="u-visually-hidden" aria-hidden="true" data-test="darwin-icons"> <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><symbol id="icon-eds-i-accesses-medium" viewBox="0 0 24 24"><path d="M15.59 1a1 1 0 0 1 .706.291l5.41 5.385a1 1 0 0 1 .294.709v13.077c0 .674-.269 1.32-.747 1.796a2.549 2.549 0 0 1-1.798.742H15a1 1 0 0 1 0-2h4.455a.549.549 0 0 0 .387-.16.535.535 0 0 0 .158-.378V7.8L15.178 3H5.545a.543.543 0 0 0-.538.451L5 3.538v8.607a1 1 0 0 1-2 0V3.538A2.542 2.542 0 0 1 5.545 1h10.046ZM8 13c2.052 0 4.66 1.61 6.36 3.4l.124.141c.333.41.516.925.516 1.459 0 .6-.232 1.178-.64 1.599C12.666 21.388 10.054 23 8 23c-2.052 0-4.66-1.61-6.353-3.393A2.31 2.31 0 0 1 1 18c0-.6.232-1.178.64-1.6C3.34 14.61 5.948 13 8 13Zm0 2c-1.369 0-3.552 1.348-4.917 2.785A.31.31 0 0 0 3 18c0 .083.031.161.09.222C4.447 19.652 6.631 21 8 21c1.37 0 3.556-1.35 4.917-2.785A.31.31 0 0 0 13 18a.32.32 0 0 0-.048-.17l-.042-.052C11.553 16.348 9.369 15 8 15Zm0 1a2 2 0 1 1 0 4 2 2 0 0 1 0-4Z"/></symbol><symbol id="icon-eds-i-altmetric-medium" viewBox="0 0 24 24"><path d="M12 1c5.978 0 10.843 4.77 10.996 10.712l.004.306-.002.022-.002.248C22.843 18.23 17.978 23 12 23 5.925 23 1 18.075 1 12S5.925 1 12 1Zm-1.726 9.246L8.848 12.53a1 1 0 0 1-.718.461L8.003 13l-4.947.014a9.001 9.001 0 0 0 17.887-.001L16.553 13l-2.205 3.53a1 1 0 0 1-1.735-.068l-.05-.11-2.289-6.106ZM12 3a9.001 9.001 0 0 0-8.947 8.013l4.391-.012L9.652 7.47a1 1 0 0 1 1.784.179l2.288 6.104 1.428-2.283a1 1 0 0 1 .722-.462l.129-.008 4.943.012A9.001 9.001 0 0 0 12 3Z"/></symbol><symbol id="icon-eds-i-arrow-bend-down-medium" viewBox="0 0 24 24"><path d="m11.852 20.989.058.007L12 21l.075-.003.126-.017.111-.03.111-.044.098-.052.104-.074.082-.073 6-6a1 1 0 0 0-1.414-1.414L13 17.585v-12.2C13 4.075 11.964 3 10.667 3H4a1 1 0 1 0 0 2h6.667c.175 0 .333.164.333.385v12.2l-4.293-4.292a1 1 0 0 0-1.32-.083l-.094.083a1 1 0 0 0 0 1.414l6 6c.035.036.073.068.112.097l.11.071.114.054.105.035.118.025Z"/></symbol><symbol id="icon-eds-i-arrow-bend-down-small" viewBox="0 0 16 16"><path d="M1 2a1 1 0 0 0 1 1h5v8.585L3.707 8.293a1 1 0 0 0-1.32-.083l-.094.083a1 1 0 0 0 0 1.414l5 5 .063.059.093.069.081.048.105.048.104.035.105.022.096.01h.136l.122-.018.113-.03.103-.04.1-.053.102-.07.052-.043 5.04-5.037a1 1 0 1 0-1.415-1.414L9 11.583V3a2 2 0 0 0-2-2H2a1 1 0 0 0-1 1Z"/></symbol><symbol id="icon-eds-i-arrow-bend-up-medium" viewBox="0 0 24 24"><path d="m11.852 3.011.058-.007L12 3l.075.003.126.017.111.03.111.044.098.052.104.074.082.073 6 6a1 1 0 1 1-1.414 1.414L13 6.415v12.2C13 19.925 11.964 21 10.667 21H4a1 1 0 0 1 0-2h6.667c.175 0 .333-.164.333-.385v-12.2l-4.293 4.292a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414l6-6c.035-.036.073-.068.112-.097l.11-.071.114-.054.105-.035.118-.025Z"/></symbol><symbol id="icon-eds-i-arrow-bend-up-small" viewBox="0 0 16 16"><path d="M1 13.998a1 1 0 0 1 1-1h5V4.413L3.707 7.705a1 1 0 0 1-1.32.084l-.094-.084a1 1 0 0 1 0-1.414l5-5 .063-.059.093-.068.081-.05.105-.047.104-.035.105-.022L7.94 1l.136.001.122.017.113.03.103.04.1.053.102.07.052.043 5.04 5.037a1 1 0 1 1-1.415 1.414L9 4.415v8.583a2 2 0 0 1-2 2H2a1 1 0 0 1-1-1Z"/></symbol><symbol id="icon-eds-i-arrow-diagonal-medium" viewBox="0 0 24 24"><path d="M14 3h6l.075.003.126.017.111.03.111.044.098.052.096.067.09.08c.036.035.068.073.097.112l.071.11.054.114.035.105.03.148L21 4v6a1 1 0 0 1-2 0V6.414l-4.293 4.293a1 1 0 0 1-1.414-1.414L17.584 5H14a1 1 0 0 1-.993-.883L13 4a1 1 0 0 1 1-1ZM4 13a1 1 0 0 1 1 1v3.584l4.293-4.291a1 1 0 1 1 1.414 1.414L6.414 19H10a1 1 0 0 1 .993.883L11 20a1 1 0 0 1-1 1l-6.075-.003-.126-.017-.111-.03-.111-.044-.098-.052-.096-.067-.09-.08a1.01 1.01 0 0 1-.097-.112l-.071-.11-.054-.114-.035-.105-.025-.118-.007-.058L3 20v-6a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-arrow-diagonal-small" viewBox="0 0 16 16"><path d="m2 15-.082-.004-.119-.016-.111-.03-.111-.044-.098-.052-.096-.067-.09-.08a1.008 1.008 0 0 1-.097-.112l-.071-.11-.031-.062-.034-.081-.024-.076-.025-.118-.007-.058L1 14.02V9a1 1 0 1 1 2 0v2.584l2.793-2.791a1 1 0 1 1 1.414 1.414L4.414 13H7a1 1 0 0 1 .993.883L8 14a1 1 0 0 1-1 1H2ZM14 1l.081.003.12.017.111.03.111.044.098.052.096.067.09.08c.036.035.068.073.097.112l.071.11.031.062.034.081.024.076.03.148L15 2v5a1 1 0 0 1-2 0V4.414l-2.96 2.96A1 1 0 1 1 8.626 5.96L11.584 3H9a1 1 0 0 1-.993-.883L8 2a1 1 0 0 1 1-1h5Z"/></symbol><symbol id="icon-eds-i-arrow-down-medium" viewBox="0 0 24 24"><path d="m20.707 12.728-7.99 7.98a.996.996 0 0 1-.561.281l-.157.011a.998.998 0 0 1-.788-.384l-7.918-7.908a1 1 0 0 1 1.414-1.416L11 17.576V4a1 1 0 0 1 2 0v13.598l6.293-6.285a1 1 0 0 1 1.32-.082l.095.083a1 1 0 0 1-.001 1.414Z"/></symbol><symbol id="icon-eds-i-arrow-down-small" viewBox="0 0 16 16"><path d="m1.293 8.707 6 6 .063.059.093.069.081.048.105.049.104.034.056.013.118.017L8 15l.076-.003.122-.017.113-.03.085-.032.063-.03.098-.058.06-.043.05-.043 6.04-6.037a1 1 0 0 0-1.414-1.414L9 11.583V2a1 1 0 1 0-2 0v9.585L2.707 7.293a1 1 0 0 0-1.32-.083l-.094.083a1 1 0 0 0 0 1.414Z"/></symbol><symbol id="icon-eds-i-arrow-left-medium" viewBox="0 0 24 24"><path d="m11.272 3.293-7.98 7.99a.996.996 0 0 0-.281.561L3 12.001c0 .32.15.605.384.788l7.908 7.918a1 1 0 0 0 1.416-1.414L6.424 13H20a1 1 0 0 0 0-2H6.402l6.285-6.293a1 1 0 0 0 .082-1.32l-.083-.095a1 1 0 0 0-1.414.001Z"/></symbol><symbol id="icon-eds-i-arrow-left-small" viewBox="0 0 16 16"><path d="m7.293 1.293-6 6-.059.063-.069.093-.048.081-.049.105-.034.104-.013.056-.017.118L1 8l.003.076.017.122.03.113.032.085.03.063.058.098.043.06.043.05 6.037 6.04a1 1 0 0 0 1.414-1.414L4.417 9H14a1 1 0 0 0 0-2H4.415l4.292-4.293a1 1 0 0 0 .083-1.32l-.083-.094a1 1 0 0 0-1.414 0Z"/></symbol><symbol id="icon-eds-i-arrow-right-medium" viewBox="0 0 24 24"><path d="m12.728 3.293 7.98 7.99a.996.996 0 0 1 .281.561l.011.157c0 .32-.15.605-.384.788l-7.908 7.918a1 1 0 0 1-1.416-1.414L17.576 13H4a1 1 0 0 1 0-2h13.598l-6.285-6.293a1 1 0 0 1-.082-1.32l.083-.095a1 1 0 0 1 1.414.001Z"/></symbol><symbol id="icon-eds-i-arrow-right-small" viewBox="0 0 16 16"><path d="m8.707 1.293 6 6 .059.063.069.093.048.081.049.105.034.104.013.056.017.118L15 8l-.003.076-.017.122-.03.113-.032.085-.03.063-.058.098-.043.06-.043.05-6.037 6.04a1 1 0 0 1-1.414-1.414L11.583 9H2a1 1 0 1 1 0-2h9.585L7.293 2.707a1 1 0 0 1-.083-1.32l.083-.094a1 1 0 0 1 1.414 0Z"/></symbol><symbol id="icon-eds-i-arrow-up-medium" viewBox="0 0 24 24"><path d="m3.293 11.272 7.99-7.98a.996.996 0 0 1 .561-.281L12.001 3c.32 0 .605.15.788.384l7.918 7.908a1 1 0 0 1-1.414 1.416L13 6.424V20a1 1 0 0 1-2 0V6.402l-6.293 6.285a1 1 0 0 1-1.32.082l-.095-.083a1 1 0 0 1 .001-1.414Z"/></symbol><symbol id="icon-eds-i-arrow-up-small" viewBox="0 0 16 16"><path d="m1.293 7.293 6-6 .063-.059.093-.069.081-.048.105-.049.104-.034.056-.013.118-.017L8 1l.076.003.122.017.113.03.085.032.063.03.098.058.06.043.05.043 6.04 6.037a1 1 0 0 1-1.414 1.414L9 4.417V14a1 1 0 0 1-2 0V4.415L2.707 8.707a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414Z"/></symbol><symbol id="icon-eds-i-article-medium" viewBox="0 0 24 24"><path d="M8 7a1 1 0 0 0 0 2h4a1 1 0 1 0 0-2H8ZM8 11a1 1 0 1 0 0 2h8a1 1 0 1 0 0-2H8ZM7 16a1 1 0 0 1 1-1h8a1 1 0 1 1 0 2H8a1 1 0 0 1-1-1Z"/><path d="M5.545 1A2.542 2.542 0 0 0 3 3.538v16.924A2.542 2.542 0 0 0 5.545 23h12.91A2.542 2.542 0 0 0 21 20.462V3.5A2.5 2.5 0 0 0 18.5 1H5.545ZM5 3.538C5 3.245 5.24 3 5.545 3H18.5a.5.5 0 0 1 .5.5v16.962c0 .293-.24.538-.546.538H5.545A.542.542 0 0 1 5 20.462V3.538Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-book-medium" viewBox="0 0 24 24"><path d="M18.5 1A2.5 2.5 0 0 1 21 3.5v12c0 1.16-.79 2.135-1.86 2.418l-.14.031V21h1a1 1 0 0 1 .993.883L21 22a1 1 0 0 1-1 1H6.5A3.5 3.5 0 0 1 3 19.5v-15A3.5 3.5 0 0 1 6.5 1h12ZM17 18H6.5a1.5 1.5 0 0 0-1.493 1.356L5 19.5A1.5 1.5 0 0 0 6.5 21H17v-3Zm1.5-15h-12A1.5 1.5 0 0 0 5 4.5v11.837l.054-.025a3.481 3.481 0 0 1 1.254-.307L6.5 16h12a.5.5 0 0 0 .492-.41L19 15.5v-12a.5.5 0 0 0-.5-.5ZM15 6a1 1 0 0 1 0 2H9a1 1 0 1 1 0-2h6Z"/></symbol><symbol id="icon-eds-i-book-series-medium" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M1 3.786C1 2.759 1.857 2 2.82 2H6.18c.964 0 1.82.759 1.82 1.786V4h3.168c.668 0 1.298.364 1.616.938.158-.109.333-.195.523-.252l3.216-.965c.923-.277 1.962.204 2.257 1.187l4.146 13.82c.296.984-.307 1.957-1.23 2.234l-3.217.965c-.923.277-1.962-.203-2.257-1.187L13 10.005v10.21c0 1.04-.878 1.785-1.834 1.785H7.833c-.291 0-.575-.07-.83-.195A1.849 1.849 0 0 1 6.18 22H2.821C1.857 22 1 21.241 1 20.214V3.786ZM3 4v11h3V4H3Zm0 16v-3h3v3H3Zm15.075-.04-.814-2.712 2.874-.862.813 2.712-2.873.862Zm1.485-5.49-2.874.862-2.634-8.782 2.873-.862 2.635 8.782ZM8 20V6h3v14H8Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-calendar-acceptance-medium" viewBox="0 0 24 24"><path d="M17 2a1 1 0 0 1 1 1v1h1.5C20.817 4 22 5.183 22 6.5v13c0 1.317-1.183 2.5-2.5 2.5h-15C3.183 22 2 20.817 2 19.5v-13C2 5.183 3.183 4 4.5 4a1 1 0 1 1 0 2c-.212 0-.5.288-.5.5v13c0 .212.288.5.5.5h15c.212 0 .5-.288.5-.5v-13c0-.212-.288-.5-.5-.5H18v1a1 1 0 0 1-2 0V3a1 1 0 0 1 1-1Zm-.534 7.747a1 1 0 0 1 .094 1.412l-4.846 5.538a1 1 0 0 1-1.352.141l-2.77-2.076a1 1 0 0 1 1.2-1.6l2.027 1.519 4.236-4.84a1 1 0 0 1 1.411-.094ZM7.5 2a1 1 0 0 1 1 1v1H14a1 1 0 0 1 0 2H8.5v1a1 1 0 1 1-2 0V3a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-calendar-date-medium" viewBox="0 0 24 24"><path d="M17 2a1 1 0 0 1 1 1v1h1.5C20.817 4 22 5.183 22 6.5v13c0 1.317-1.183 2.5-2.5 2.5h-15C3.183 22 2 20.817 2 19.5v-13C2 5.183 3.183 4 4.5 4a1 1 0 1 1 0 2c-.212 0-.5.288-.5.5v13c0 .212.288.5.5.5h15c.212 0 .5-.288.5-.5v-13c0-.212-.288-.5-.5-.5H18v1a1 1 0 0 1-2 0V3a1 1 0 0 1 1-1ZM8 15a1 1 0 1 1 0 2 1 1 0 0 1 0-2Zm4 0a1 1 0 1 1 0 2 1 1 0 0 1 0-2Zm-4-4a1 1 0 1 1 0 2 1 1 0 0 1 0-2Zm4 0a1 1 0 1 1 0 2 1 1 0 0 1 0-2Zm4 0a1 1 0 1 1 0 2 1 1 0 0 1 0-2ZM7.5 2a1 1 0 0 1 1 1v1H14a1 1 0 0 1 0 2H8.5v1a1 1 0 1 1-2 0V3a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-calendar-decision-medium" viewBox="0 0 24 24"><path d="M17 2a1 1 0 0 1 1 1v1h1.5C20.817 4 22 5.183 22 6.5v13c0 1.317-1.183 2.5-2.5 2.5h-15C3.183 22 2 20.817 2 19.5v-13C2 5.183 3.183 4 4.5 4a1 1 0 1 1 0 2c-.212 0-.5.288-.5.5v13c0 .212.288.5.5.5h15c.212 0 .5-.288.5-.5v-13c0-.212-.288-.5-.5-.5H18v1a1 1 0 0 1-2 0V3a1 1 0 0 1 1-1Zm-2.935 8.246 2.686 2.645c.34.335.34.883 0 1.218l-2.686 2.645a.858.858 0 0 1-1.213-.009.854.854 0 0 1 .009-1.21l1.05-1.035H7.984a.992.992 0 0 1-.984-1c0-.552.44-1 .984-1h5.928l-1.051-1.036a.854.854 0 0 1-.085-1.121l.076-.088a.858.858 0 0 1 1.213-.009ZM7.5 2a1 1 0 0 1 1 1v1H14a1 1 0 0 1 0 2H8.5v1a1 1 0 1 1-2 0V3a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-calendar-impact-factor-medium" viewBox="0 0 24 24"><path d="M17 2a1 1 0 0 1 1 1v1h1.5C20.817 4 22 5.183 22 6.5v13c0 1.317-1.183 2.5-2.5 2.5h-15C3.183 22 2 20.817 2 19.5v-13C2 5.183 3.183 4 4.5 4a1 1 0 1 1 0 2c-.212 0-.5.288-.5.5v13c0 .212.288.5.5.5h15c.212 0 .5-.288.5-.5v-13c0-.212-.288-.5-.5-.5H18v1a1 1 0 0 1-2 0V3a1 1 0 0 1 1-1Zm-3.2 6.924a.48.48 0 0 1 .125.544l-1.52 3.283h2.304c.27 0 .491.215.491.483a.477.477 0 0 1-.13.327l-4.18 4.484a.498.498 0 0 1-.69.031.48.48 0 0 1-.125-.544l1.52-3.284H9.291a.487.487 0 0 1-.491-.482c0-.121.047-.238.13-.327l4.18-4.484a.498.498 0 0 1 .69-.031ZM7.5 2a1 1 0 0 1 1 1v1H14a1 1 0 0 1 0 2H8.5v1a1 1 0 1 1-2 0V3a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-call-papers-medium" viewBox="0 0 24 24"><g><path d="m20.707 2.883-1.414 1.414a1 1 0 0 0 1.414 1.414l1.414-1.414a1 1 0 0 0-1.414-1.414Z"/><path d="M6 16.054c0 2.026 1.052 2.943 3 2.943a1 1 0 1 1 0 2c-2.996 0-5-1.746-5-4.943v-1.227a4.068 4.068 0 0 1-1.83-1.189 4.553 4.553 0 0 1-.87-1.455 4.868 4.868 0 0 1-.3-1.686c0-1.17.417-2.298 1.17-3.14.38-.426.834-.767 1.338-1 .51-.237 1.06-.36 1.617-.36L6.632 6H7l7.932-2.895A2.363 2.363 0 0 1 18 5.36v9.28a2.36 2.36 0 0 1-3.069 2.25l.084.03L7 14.997H6v1.057Zm9.637-11.057a.415.415 0 0 0-.083.008L8 7.638v5.536l7.424 1.786.104.02c.035.01.072.02.109.02.2 0 .363-.16.363-.36V5.36c0-.2-.163-.363-.363-.363Zm-9.638 3h-.874a1.82 1.82 0 0 0-.625.111l-.15.063a2.128 2.128 0 0 0-.689.517c-.42.47-.661 1.123-.661 1.81 0 .34.06.678.176.992.114.308.28.585.485.816.4.447.925.691 1.464.691h.874v-5Z" clip-rule="evenodd"/><path d="M20 8.997h2a1 1 0 1 1 0 2h-2a1 1 0 1 1 0-2ZM20.707 14.293l1.414 1.414a1 1 0 0 1-1.414 1.414l-1.414-1.414a1 1 0 0 1 1.414-1.414Z"/></g></symbol><symbol id="icon-eds-i-card-medium" viewBox="0 0 24 24"><path d="M19.615 2c.315 0 .716.067 1.14.279.76.38 1.245 1.107 1.245 2.106v15.23c0 .315-.067.716-.279 1.14-.38.76-1.107 1.245-2.106 1.245H4.385a2.56 2.56 0 0 1-1.14-.279C2.485 21.341 2 20.614 2 19.615V4.385c0-.315.067-.716.279-1.14C2.659 2.485 3.386 2 4.385 2h15.23Zm0 2H4.385c-.213 0-.265.034-.317.14A.71.71 0 0 0 4 4.385v15.23c0 .213.034.265.14.317a.71.71 0 0 0 .245.068h15.23c.213 0 .265-.034.317-.14a.71.71 0 0 0 .068-.245V4.385c0-.213-.034-.265-.14-.317A.71.71 0 0 0 19.615 4ZM17 16a1 1 0 0 1 0 2H7a1 1 0 0 1 0-2h10Zm0-3a1 1 0 0 1 0 2H7a1 1 0 0 1 0-2h10Zm-.5-7A1.5 1.5 0 0 1 18 7.5v3a1.5 1.5 0 0 1-1.5 1.5h-9A1.5 1.5 0 0 1 6 10.5v-3A1.5 1.5 0 0 1 7.5 6h9ZM16 8H8v2h8V8Z"/></symbol><symbol id="icon-eds-i-cart-medium" viewBox="0 0 24 24"><path d="M5.76 1a1 1 0 0 1 .994.902L7.155 6h13.34c.18 0 .358.02.532.057l.174.045a2.5 2.5 0 0 1 1.693 3.103l-2.069 7.03c-.36 1.099-1.398 1.823-2.49 1.763H8.65c-1.272.015-2.352-.927-2.546-2.244L4.852 3H2a1 1 0 0 1-.993-.883L1 2a1 1 0 0 1 1-1h3.76Zm2.328 14.51a.555.555 0 0 0 .55.488l9.751.001a.533.533 0 0 0 .527-.357l2.059-7a.5.5 0 0 0-.48-.642H7.351l.737 7.51ZM18 19a2 2 0 1 1 0 4 2 2 0 0 1 0-4ZM8 19a2 2 0 1 1 0 4 2 2 0 0 1 0-4Z"/></symbol><symbol id="icon-eds-i-check-circle-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 2a9 9 0 1 0 0 18 9 9 0 0 0 0-18Zm5.125 4.72a1 1 0 0 1 .156 1.405l-6 7.5a1 1 0 0 1-1.421.143l-3-2.5a1 1 0 0 1 1.28-1.536l2.217 1.846 5.362-6.703a1 1 0 0 1 1.406-.156Z"/></symbol><symbol id="icon-eds-i-check-filled-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm5.125 6.72a1 1 0 0 0-1.406.155l-5.362 6.703-2.217-1.846a1 1 0 1 0-1.28 1.536l3 2.5a1 1 0 0 0 1.42-.143l6-7.5a1 1 0 0 0-.155-1.406Z"/></symbol><symbol id="icon-eds-i-chevron-down-medium" viewBox="0 0 24 24"><path d="M3.305 8.28a1 1 0 0 0-.024 1.415l7.495 7.762c.314.345.757.543 1.224.543.467 0 .91-.198 1.204-.522l7.515-7.783a1 1 0 1 0-1.438-1.39L12 15.845l-7.28-7.54A1 1 0 0 0 3.4 8.2l-.096.082Z"/></symbol><symbol id="icon-eds-i-chevron-down-small" viewBox="0 0 16 16"><path d="M13.692 5.278a1 1 0 0 1 .03 1.414L9.103 11.51a1.491 1.491 0 0 1-2.188.019L2.278 6.692a1 1 0 0 1 1.444-1.384L8 9.771l4.278-4.463a1 1 0 0 1 1.318-.111l.096.081Z"/></symbol><symbol id="icon-eds-i-chevron-left-medium" viewBox="0 0 24 24"><path d="M15.72 3.305a1 1 0 0 0-1.415-.024l-7.762 7.495A1.655 1.655 0 0 0 6 12c0 .467.198.91.522 1.204l7.783 7.515a1 1 0 1 0 1.39-1.438L8.155 12l7.54-7.28A1 1 0 0 0 15.8 3.4l-.082-.096Z"/></symbol><symbol id="icon-eds-i-chevron-left-small" viewBox="0 0 16 16"><path d="M10.722 2.308a1 1 0 0 0-1.414-.03L4.49 6.897a1.491 1.491 0 0 0-.019 2.188l4.838 4.637a1 1 0 1 0 1.384-1.444L6.229 8l4.463-4.278a1 1 0 0 0 .111-1.318l-.081-.096Z"/></symbol><symbol id="icon-eds-i-chevron-right-medium" viewBox="0 0 24 24"><path d="M8.28 3.305a1 1 0 0 1 1.415-.024l7.762 7.495c.345.314.543.757.543 1.224 0 .467-.198.91-.522 1.204l-7.783 7.515a1 1 0 1 1-1.39-1.438L15.845 12l-7.54-7.28A1 1 0 0 1 8.2 3.4l.082-.096Z"/></symbol><symbol id="icon-eds-i-chevron-right-small" viewBox="0 0 16 16"><path d="M5.278 2.308a1 1 0 0 1 1.414-.03l4.819 4.619a1.491 1.491 0 0 1 .019 2.188l-4.838 4.637a1 1 0 1 1-1.384-1.444L9.771 8 5.308 3.722a1 1 0 0 1-.111-1.318l.081-.096Z"/></symbol><symbol id="icon-eds-i-chevron-up-medium" viewBox="0 0 24 24"><path d="M20.695 15.72a1 1 0 0 0 .024-1.415l-7.495-7.762A1.655 1.655 0 0 0 12 6c-.467 0-.91.198-1.204.522l-7.515 7.783a1 1 0 1 0 1.438 1.39L12 8.155l7.28 7.54a1 1 0 0 0 1.319.106l.096-.082Z"/></symbol><symbol id="icon-eds-i-chevron-up-small" viewBox="0 0 16 16"><path d="M13.692 10.722a1 1 0 0 0 .03-1.414L9.103 4.49a1.491 1.491 0 0 0-2.188-.019L2.278 9.308a1 1 0 0 0 1.444 1.384L8 6.229l4.278 4.463a1 1 0 0 0 1.318.111l.096-.081Z"/></symbol><symbol id="icon-eds-i-citations-medium" viewBox="0 0 24 24"><path d="M15.59 1a1 1 0 0 1 .706.291l5.41 5.385a1 1 0 0 1 .294.709v13.077c0 .674-.269 1.32-.747 1.796a2.549 2.549 0 0 1-1.798.742h-5.843a1 1 0 1 1 0-2h5.843a.549.549 0 0 0 .387-.16.535.535 0 0 0 .158-.378V7.8L15.178 3H5.545a.543.543 0 0 0-.538.451L5 3.538v8.607a1 1 0 0 1-2 0V3.538A2.542 2.542 0 0 1 5.545 1h10.046ZM5.483 14.35c.197.26.17.62-.049.848l-.095.083-.016.011c-.36.24-.628.45-.804.634-.393.409-.59.93-.59 1.562.077-.019.192-.028.345-.028.442 0 .84.158 1.195.474.355.316.532.716.532 1.2 0 .501-.173.9-.518 1.198-.345.298-.767.446-1.266.446-.672 0-1.209-.195-1.612-.585-.403-.39-.604-.976-.604-1.757 0-.744.11-1.39.33-1.938.222-.549.49-1.009.807-1.38a4.28 4.28 0 0 1 .992-.88c.07-.043.148-.087.232-.133a.881.881 0 0 1 1.121.245Zm5 0c.197.26.17.62-.049.848l-.095.083-.016.011c-.36.24-.628.45-.804.634-.393.409-.59.93-.59 1.562.077-.019.192-.028.345-.028.442 0 .84.158 1.195.474.355.316.532.716.532 1.2 0 .501-.173.9-.518 1.198-.345.298-.767.446-1.266.446-.672 0-1.209-.195-1.612-.585-.403-.39-.604-.976-.604-1.757 0-.744.11-1.39.33-1.938.222-.549.49-1.009.807-1.38a4.28 4.28 0 0 1 .992-.88c.07-.043.148-.087.232-.133a.881.881 0 0 1 1.121.245Z"/></symbol><symbol id="icon-eds-i-clipboard-check-medium" viewBox="0 0 24 24"><path d="M14.4 1c1.238 0 2.274.865 2.536 2.024L18.5 3C19.886 3 21 4.14 21 5.535v14.93C21 21.86 19.886 23 18.5 23h-13C4.114 23 3 21.86 3 20.465V5.535C3 4.14 4.114 3 5.5 3h1.57c.27-1.147 1.3-2 2.53-2h4.8Zm4.115 4-1.59.024A2.601 2.601 0 0 1 14.4 7H9.6c-1.23 0-2.26-.853-2.53-2H5.5c-.27 0-.5.234-.5.535v14.93c0 .3.23.535.5.535h13c.27 0 .5-.234.5-.535V5.535c0-.3-.23-.535-.485-.535Zm-1.909 4.205a1 1 0 0 1 .19 1.401l-5.334 7a1 1 0 0 1-1.344.23l-2.667-1.75a1 1 0 1 1 1.098-1.672l1.887 1.238 4.769-6.258a1 1 0 0 1 1.401-.19ZM14.4 3H9.6a.6.6 0 0 0-.6.6v.8a.6.6 0 0 0 .6.6h4.8a.6.6 0 0 0 .6-.6v-.8a.6.6 0 0 0-.6-.6Z"/></symbol><symbol id="icon-eds-i-clipboard-report-medium" viewBox="0 0 24 24"><path d="M14.4 1c1.238 0 2.274.865 2.536 2.024L18.5 3C19.886 3 21 4.14 21 5.535v14.93C21 21.86 19.886 23 18.5 23h-13C4.114 23 3 21.86 3 20.465V5.535C3 4.14 4.114 3 5.5 3h1.57c.27-1.147 1.3-2 2.53-2h4.8Zm4.115 4-1.59.024A2.601 2.601 0 0 1 14.4 7H9.6c-1.23 0-2.26-.853-2.53-2H5.5c-.27 0-.5.234-.5.535v14.93c0 .3.23.535.5.535h13c.27 0 .5-.234.5-.535V5.535c0-.3-.23-.535-.485-.535Zm-2.658 10.929a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h7.857Zm0-3.929a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h7.857ZM14.4 3H9.6a.6.6 0 0 0-.6.6v.8a.6.6 0 0 0 .6.6h4.8a.6.6 0 0 0 .6-.6v-.8a.6.6 0 0 0-.6-.6Z"/></symbol><symbol id="icon-eds-i-close-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 2a9 9 0 1 0 0 18 9 9 0 0 0 0-18ZM8.707 7.293 12 10.585l3.293-3.292a1 1 0 0 1 1.414 1.414L13.415 12l3.292 3.293a1 1 0 0 1-1.414 1.414L12 13.415l-3.293 3.292a1 1 0 1 1-1.414-1.414L10.585 12 7.293 8.707a1 1 0 0 1 1.414-1.414Z"/></symbol><symbol id="icon-eds-i-cloud-upload-medium" viewBox="0 0 24 24"><path d="m12.852 10.011.028-.004L13 10l.075.003.126.017.086.022.136.052.098.052.104.074.082.073 3 3a1 1 0 0 1 0 1.414l-.094.083a1 1 0 0 1-1.32-.083L14 13.416V20a1 1 0 0 1-2 0v-6.586l-1.293 1.293a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414l3-3 .112-.097.11-.071.114-.054.105-.035.118-.025Zm.587-7.962c3.065.362 5.497 2.662 5.992 5.562l.013.085.207.073c2.117.782 3.496 2.845 3.337 5.097l-.022.226c-.297 2.561-2.503 4.491-5.124 4.502a1 1 0 1 1-.009-2c1.619-.007 2.967-1.186 3.147-2.733.179-1.542-.86-2.979-2.487-3.353-.512-.149-.894-.579-.981-1.165-.21-2.237-2-4.035-4.308-4.308-2.31-.273-4.497 1.06-5.25 3.19l-.049.113c-.234.468-.718.756-1.176.743-1.418.057-2.689.857-3.32 2.084a3.668 3.668 0 0 0 .262 3.798c.796 1.136 2.169 1.764 3.583 1.635a1 1 0 1 1 .182 1.992c-2.125.194-4.193-.753-5.403-2.48a5.668 5.668 0 0 1-.403-5.86c.85-1.652 2.449-2.79 4.323-3.092l.287-.039.013-.028c1.207-2.741 4.125-4.404 7.186-4.042Z"/></symbol><symbol id="icon-eds-i-collection-medium" viewBox="0 0 24 24"><path d="M21 7a1 1 0 0 1 1 1v12.5a2.5 2.5 0 0 1-2.5 2.5H8a1 1 0 0 1 0-2h11.5a.5.5 0 0 0 .5-.5V8a1 1 0 0 1 1-1Zm-5.5-5A2.5 2.5 0 0 1 18 4.5v12a2.5 2.5 0 0 1-2.5 2.5h-11A2.5 2.5 0 0 1 2 16.5v-12A2.5 2.5 0 0 1 4.5 2h11Zm0 2h-11a.5.5 0 0 0-.5.5v12a.5.5 0 0 0 .5.5h11a.5.5 0 0 0 .5-.5v-12a.5.5 0 0 0-.5-.5ZM13 13a1 1 0 0 1 0 2H7a1 1 0 0 1 0-2h6Zm0-3.5a1 1 0 0 1 0 2H7a1 1 0 0 1 0-2h6ZM13 6a1 1 0 0 1 0 2H7a1 1 0 1 1 0-2h6Z"/></symbol><symbol id="icon-eds-i-conference-series-medium" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M4.5 2A2.5 2.5 0 0 0 2 4.5v11A2.5 2.5 0 0 0 4.5 18h2.37l-2.534 2.253a1 1 0 0 0 1.328 1.494L9.88 18H11v3a1 1 0 1 0 2 0v-3h1.12l4.216 3.747a1 1 0 0 0 1.328-1.494L17.13 18h2.37a2.5 2.5 0 0 0 2.5-2.5v-11A2.5 2.5 0 0 0 19.5 2h-15ZM20 6V4.5a.5.5 0 0 0-.5-.5h-15a.5.5 0 0 0-.5.5V6h16ZM4 8v7.5a.5.5 0 0 0 .5.5h15a.5.5 0 0 0 .5-.5V8H4Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-delivery-medium" viewBox="0 0 24 24"><path d="M8.51 20.598a3.037 3.037 0 0 1-3.02 0A2.968 2.968 0 0 1 4.161 19L3.5 19A2.5 2.5 0 0 1 1 16.5v-11A2.5 2.5 0 0 1 3.5 3h10a2.5 2.5 0 0 1 2.45 2.004L16 5h2.527c.976 0 1.855.585 2.27 1.49l2.112 4.62a1 1 0 0 1 .091.416v4.856C23 17.814 21.889 19 20.484 19h-.523a1.01 1.01 0 0 1-.121-.007 2.96 2.96 0 0 1-1.33 1.605 3.037 3.037 0 0 1-3.02 0A2.968 2.968 0 0 1 14.161 19H9.838a2.968 2.968 0 0 1-1.327 1.597Zm-2.024-3.462a.955.955 0 0 0-.481.73L5.999 18l.001.022a.944.944 0 0 0 .388.777l.098.065c.316.181.712.181 1.028 0A.97.97 0 0 0 8 17.978a.95.95 0 0 0-.486-.842 1.037 1.037 0 0 0-1.028 0Zm10 0a.955.955 0 0 0-.481.73l-.005.156a.944.944 0 0 0 .388.777l.098.065c.316.181.712.181 1.028 0a.97.97 0 0 0 .486-.886.95.95 0 0 0-.486-.842 1.037 1.037 0 0 0-1.028 0ZM21 12h-5v3.17a3.038 3.038 0 0 1 2.51.232 2.993 2.993 0 0 1 1.277 1.45l.058.155.058-.005.581-.002c.27 0 .516-.263.516-.618V12Zm-7.5-7h-10a.5.5 0 0 0-.5.5v11a.5.5 0 0 0 .5.5h.662a2.964 2.964 0 0 1 1.155-1.491l.172-.107a3.037 3.037 0 0 1 3.022 0A2.987 2.987 0 0 1 9.843 17H13.5a.5.5 0 0 0 .5-.5v-11a.5.5 0 0 0-.5-.5Zm5.027 2H16v3h4.203l-1.224-2.677a.532.532 0 0 0-.375-.316L18.527 7Z"/></symbol><symbol id="icon-eds-i-download-medium" viewBox="0 0 24 24"><path d="M22 18.5a3.5 3.5 0 0 1-3.5 3.5h-13A3.5 3.5 0 0 1 2 18.5V18a1 1 0 0 1 2 0v.5A1.5 1.5 0 0 0 5.5 20h13a1.5 1.5 0 0 0 1.5-1.5V18a1 1 0 0 1 2 0v.5Zm-3.293-7.793-6 6-.063.059-.093.069-.081.048-.105.049-.104.034-.056.013-.118.017L12 17l-.076-.003-.122-.017-.113-.03-.085-.032-.063-.03-.098-.058-.06-.043-.05-.043-6.04-6.037a1 1 0 0 1 1.414-1.414l4.294 4.29L11 3a1 1 0 0 1 2 0l.001 10.585 4.292-4.292a1 1 0 0 1 1.32-.083l.094.083a1 1 0 0 1 0 1.414Z"/></symbol><symbol id="icon-eds-i-edit-medium" viewBox="0 0 24 24"><path d="M17.149 2a2.38 2.38 0 0 1 1.699.711l2.446 2.46a2.384 2.384 0 0 1 .005 3.38L10.01 19.906a1 1 0 0 1-.434.257l-6.3 1.8a1 1 0 0 1-1.237-1.237l1.8-6.3a1 1 0 0 1 .257-.434L15.443 2.718A2.385 2.385 0 0 1 17.15 2Zm-3.874 5.689-7.586 7.536-1.234 4.319 4.318-1.234 7.54-7.582-3.038-3.039ZM17.149 4a.395.395 0 0 0-.286.126L14.695 6.28l3.029 3.029 2.162-2.173a.384.384 0 0 0 .106-.197L20 6.864c0-.103-.04-.2-.119-.278l-2.457-2.47A.385.385 0 0 0 17.149 4Z"/></symbol><symbol id="icon-eds-i-education-medium" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M12.41 2.088a1 1 0 0 0-.82 0l-10 4.5a1 1 0 0 0 0 1.824L3 9.047v7.124A3.001 3.001 0 0 0 4 22a3 3 0 0 0 1-5.83V9.948l1 .45V14.5a1 1 0 0 0 .087.408L7 14.5c-.913.408-.912.41-.912.41l.001.003.003.006.007.015a1.988 1.988 0 0 0 .083.16c.054.097.131.225.236.373.21.297.53.68.993 1.057C8.351 17.292 9.824 18 12 18c2.176 0 3.65-.707 4.589-1.476.463-.378.783-.76.993-1.057a4.162 4.162 0 0 0 .319-.533l.007-.015.003-.006v-.003h.002s0-.002-.913-.41l.913.408A1 1 0 0 0 18 14.5v-4.103l4.41-1.985a1 1 0 0 0 0-1.824l-10-4.5ZM16 11.297l-3.59 1.615a1 1 0 0 1-.82 0L8 11.297v2.94a3.388 3.388 0 0 0 .677.739C9.267 15.457 10.294 16 12 16s2.734-.543 3.323-1.024a3.388 3.388 0 0 0 .677-.739v-2.94ZM4.437 7.5 12 4.097 19.563 7.5 12 10.903 4.437 7.5ZM3 19a1 1 0 1 1 2 0 1 1 0 0 1-2 0Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-error-diamond-medium" viewBox="0 0 24 24"><path d="M12.002 1c.702 0 1.375.279 1.871.775l8.35 8.353a2.646 2.646 0 0 1 .001 3.744l-8.353 8.353a2.646 2.646 0 0 1-3.742 0l-8.353-8.353a2.646 2.646 0 0 1 0-3.744l8.353-8.353.156-.142c.424-.362.952-.58 1.507-.625l.21-.008Zm0 2a.646.646 0 0 0-.38.123l-.093.08-8.34 8.34a.646.646 0 0 0-.18.355L3 12c0 .171.068.336.19.457l8.353 8.354a.646.646 0 0 0 .914 0l8.354-8.354a.646.646 0 0 0-.001-.914l-8.351-8.354A.646.646 0 0 0 12.002 3ZM12 14.5a1.5 1.5 0 0 1 .144 2.993L12 17.5a1.5 1.5 0 0 1 0-3ZM12 6a1 1 0 0 1 1 1v5a1 1 0 0 1-2 0V7a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-error-filled-medium" viewBox="0 0 24 24"><path d="M12.002 1c.702 0 1.375.279 1.871.775l8.35 8.353a2.646 2.646 0 0 1 .001 3.744l-8.353 8.353a2.646 2.646 0 0 1-3.742 0l-8.353-8.353a2.646 2.646 0 0 1 0-3.744l8.353-8.353.156-.142c.424-.362.952-.58 1.507-.625l.21-.008ZM12 14.5a1.5 1.5 0 0 0 0 3l.144-.007A1.5 1.5 0 0 0 12 14.5ZM12 6a1 1 0 0 0-1 1v5a1 1 0 0 0 2 0V7a1 1 0 0 0-1-1Z"/></symbol><symbol id="icon-eds-i-external-link-medium" viewBox="0 0 24 24"><path d="M9 2a1 1 0 1 1 0 2H4.6c-.371 0-.6.209-.6.5v15c0 .291.229.5.6.5h14.8c.371 0 .6-.209.6-.5V15a1 1 0 0 1 2 0v4.5c0 1.438-1.162 2.5-2.6 2.5H4.6C3.162 22 2 20.938 2 19.5v-15C2 3.062 3.162 2 4.6 2H9Zm6 0h6l.075.003.126.017.111.03.111.044.098.052.096.067.09.08c.036.035.068.073.097.112l.071.11.054.114.035.105.03.148L22 3v6a1 1 0 0 1-2 0V5.414l-6.693 6.693a1 1 0 0 1-1.414-1.414L18.584 4H15a1 1 0 0 1-.993-.883L14 3a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-external-link-small" viewBox="0 0 16 16"><path d="M5 1a1 1 0 1 1 0 2l-2-.001V13L13 13v-2a1 1 0 0 1 2 0v2c0 1.15-.93 2-2.067 2H3.067C1.93 15 1 14.15 1 13V3c0-1.15.93-2 2.067-2H5Zm4 0h5l.075.003.126.017.111.03.111.044.098.052.096.067.09.08.044.047.073.093.051.083.054.113.035.105.03.148L15 2v5a1 1 0 0 1-2 0V4.414L9.107 8.307a1 1 0 0 1-1.414-1.414L11.584 3H9a1 1 0 0 1-.993-.883L8 2a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-file-download-medium" viewBox="0 0 24 24"><path d="M14.5 1a1 1 0 0 1 .707.293l5.5 5.5A1 1 0 0 1 21 7.5v12.962A2.542 2.542 0 0 1 18.455 23H5.545A2.542 2.542 0 0 1 3 20.462V3.538A2.542 2.542 0 0 1 5.545 1H14.5Zm-.415 2h-8.54A.542.542 0 0 0 5 3.538v16.924c0 .296.243.538.545.538h12.91a.542.542 0 0 0 .545-.538V7.915L14.085 3ZM12 7a1 1 0 0 1 1 1v6.585l2.293-2.292a1 1 0 0 1 1.32-.083l.094.083a1 1 0 0 1 0 1.414l-4 4a1.008 1.008 0 0 1-.112.097l-.11.071-.114.054-.105.035-.149.03L12 18l-.075-.003-.126-.017-.111-.03-.111-.044-.098-.052-.096-.067-.09-.08-4-4a1 1 0 0 1 1.414-1.414L11 14.585V8a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-file-report-medium" viewBox="0 0 24 24"><path d="M14.5 1a1 1 0 0 1 .707.293l5.5 5.5A1 1 0 0 1 21 7.5v12.962c0 .674-.269 1.32-.747 1.796a2.549 2.549 0 0 1-1.798.742H5.545c-.674 0-1.32-.267-1.798-.742A2.535 2.535 0 0 1 3 20.462V3.538A2.542 2.542 0 0 1 5.545 1H14.5Zm-.415 2h-8.54A.542.542 0 0 0 5 3.538v16.924c0 .142.057.278.158.379.102.102.242.159.387.159h12.91a.549.549 0 0 0 .387-.16.535.535 0 0 0 .158-.378V7.915L14.085 3ZM16 17a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h8Zm0-3a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h8Zm-4.793-6.207L13 9.585l1.793-1.792a1 1 0 0 1 1.32-.083l.094.083a1 1 0 0 1 0 1.414l-2.5 2.5a1 1 0 0 1-1.414 0L10.5 9.915l-1.793 1.792a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414l2.5-2.5a1 1 0 0 1 1.414 0Z"/></symbol><symbol id="icon-eds-i-file-text-medium" viewBox="0 0 24 24"><path d="M14.5 1a1 1 0 0 1 .707.293l5.5 5.5A1 1 0 0 1 21 7.5v12.962A2.542 2.542 0 0 1 18.455 23H5.545A2.542 2.542 0 0 1 3 20.462V3.538A2.542 2.542 0 0 1 5.545 1H14.5Zm-.415 2h-8.54A.542.542 0 0 0 5 3.538v16.924c0 .296.243.538.545.538h12.91a.542.542 0 0 0 .545-.538V7.915L14.085 3ZM16 15a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h8Zm0-4a1 1 0 0 1 0 2H8a1 1 0 0 1 0-2h8Zm-5-4a1 1 0 0 1 0 2H8a1 1 0 1 1 0-2h3Z"/></symbol><symbol id="icon-eds-i-file-upload-medium" viewBox="0 0 24 24"><path d="M14.5 1a1 1 0 0 1 .707.293l5.5 5.5A1 1 0 0 1 21 7.5v12.962A2.542 2.542 0 0 1 18.455 23H5.545A2.542 2.542 0 0 1 3 20.462V3.538A2.542 2.542 0 0 1 5.545 1H14.5Zm-.415 2h-8.54A.542.542 0 0 0 5 3.538v16.924c0 .296.243.538.545.538h12.91a.542.542 0 0 0 .545-.538V7.915L14.085 3Zm-2.233 4.011.058-.007L12 7l.075.003.126.017.111.03.111.044.098.052.104.074.082.073 4 4a1 1 0 0 1 0 1.414l-.094.083a1 1 0 0 1-1.32-.083L13 10.415V17a1 1 0 0 1-2 0v-6.585l-2.293 2.292a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414l4-4 .112-.097.11-.071.114-.054.105-.035.118-.025Z"/></symbol><symbol id="icon-eds-i-filter-medium" viewBox="0 0 24 24"><path d="M21 2a1 1 0 0 1 .82 1.573L15 13.314V18a1 1 0 0 1-.31.724l-.09.076-4 3A1 1 0 0 1 9 21v-7.684L2.18 3.573a1 1 0 0 1 .707-1.567L3 2h18Zm-1.921 2H4.92l5.9 8.427a1 1 0 0 1 .172.45L11 13v6l2-1.5V13a1 1 0 0 1 .117-.469l.064-.104L19.079 4Z"/></symbol><symbol id="icon-eds-i-funding-medium" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M23 8A7 7 0 1 0 9 8a7 7 0 0 0 14 0ZM9.006 12.225A4.07 4.07 0 0 0 6.12 11.02H2a.979.979 0 1 0 0 1.958h4.12c.558 0 1.094.222 1.489.617l2.207 2.288c.27.27.27.687.012.944a.656.656 0 0 1-.928 0L7.744 15.67a.98.98 0 0 0-1.386 1.384l1.157 1.158c.535.536 1.244.791 1.946.765l.041.002h6.922c.874 0 1.597.748 1.597 1.688 0 .203-.146.354-.309.354H7.755c-.487 0-.96-.178-1.339-.504L2.64 17.259a.979.979 0 0 0-1.28 1.482L5.137 22c.733.631 1.66.979 2.618.979h9.957c1.26 0 2.267-1.043 2.267-2.312 0-2.006-1.584-3.646-3.555-3.646h-4.529a2.617 2.617 0 0 0-.681-2.509l-2.208-2.287ZM16 3a5 5 0 1 0 0 10 5 5 0 0 0 0-10Zm.979 3.5a.979.979 0 1 0-1.958 0v3a.979.979 0 1 0 1.958 0v-3Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-hashtag-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 2a9 9 0 1 0 0 18 9 9 0 0 0 0-18ZM9.52 18.189a1 1 0 1 1-1.964-.378l.437-2.274H6a1 1 0 1 1 0-2h2.378l.592-3.076H6a1 1 0 0 1 0-2h3.354l.51-2.65a1 1 0 1 1 1.964.378l-.437 2.272h3.04l.51-2.65a1 1 0 1 1 1.964.378l-.438 2.272H18a1 1 0 0 1 0 2h-1.917l-.592 3.076H18a1 1 0 0 1 0 2h-2.893l-.51 2.652a1 1 0 1 1-1.964-.378l.437-2.274h-3.04l-.51 2.652Zm.895-4.652h3.04l.591-3.076h-3.04l-.591 3.076Z"/></symbol><symbol id="icon-eds-i-home-medium" viewBox="0 0 24 24"><path d="M5 22a1 1 0 0 1-1-1v-8.586l-1.293 1.293a1 1 0 0 1-1.32.083l-.094-.083a1 1 0 0 1 0-1.414l10-10a1 1 0 0 1 1.414 0l10 10a1 1 0 0 1-1.414 1.414L20 12.415V21a1 1 0 0 1-1 1H5Zm7-17.585-6 5.999V20h5v-4a1 1 0 0 1 2 0v4h5v-9.585l-6-6Z"/></symbol><symbol id="icon-eds-i-image-medium" viewBox="0 0 24 24"><path d="M19.615 2A2.385 2.385 0 0 1 22 4.385v15.23A2.385 2.385 0 0 1 19.615 22H4.385A2.385 2.385 0 0 1 2 19.615V4.385A2.385 2.385 0 0 1 4.385 2h15.23Zm0 2H4.385A.385.385 0 0 0 4 4.385v15.23c0 .213.172.385.385.385h1.244l10.228-8.76a1 1 0 0 1 1.254-.037L20 13.392V4.385A.385.385 0 0 0 19.615 4Zm-3.07 9.283L8.703 20h10.912a.385.385 0 0 0 .385-.385v-3.713l-3.455-2.619ZM9.5 6a3.5 3.5 0 1 1 0 7 3.5 3.5 0 0 1 0-7Zm0 2a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3Z"/></symbol><symbol id="icon-eds-i-impact-factor-medium" viewBox="0 0 24 24"><path d="M16.49 2.672c.74.694.986 1.765.632 2.712l-.04.1-1.549 3.54h1.477a2.496 2.496 0 0 1 2.485 2.34l.005.163c0 .618-.23 1.21-.642 1.675l-7.147 7.961a2.48 2.48 0 0 1-3.554.165 2.512 2.512 0 0 1-.633-2.712l.042-.103L9.108 15H7.46c-1.393 0-2.379-1.11-2.455-2.369L5 12.473c0-.593.142-1.145.628-1.692l7.307-7.944a2.48 2.48 0 0 1 3.555-.165ZM14.43 4.164l-7.33 7.97c-.083.093-.101.214-.101.34 0 .277.19.526.46.526h4.163l.097-.009c.015 0 .03.003.046.009.181.078.264.32.186.5l-2.554 5.817a.512.512 0 0 0 .127.552.48.48 0 0 0 .69-.033l7.155-7.97a.513.513 0 0 0 .13-.34.497.497 0 0 0-.49-.502h-3.988a.355.355 0 0 1-.328-.497l2.555-5.844a.512.512 0 0 0-.127-.552.48.48 0 0 0-.69.033Z"/></symbol><symbol id="icon-eds-i-info-circle-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 2a9 9 0 1 0 0 18 9 9 0 0 0 0-18Zm0 7a1 1 0 0 1 1 1v5h1.5a1 1 0 0 1 0 2h-5a1 1 0 0 1 0-2H11v-4h-.5a1 1 0 0 1-.993-.883L9.5 11a1 1 0 0 1 1-1H12Zm0-4.5a1.5 1.5 0 0 1 .144 2.993L12 8.5a1.5 1.5 0 0 1 0-3Z"/></symbol><symbol id="icon-eds-i-info-filled-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 9h-1.5a1 1 0 0 0-1 1l.007.117A1 1 0 0 0 10.5 12h.5v4H9.5a1 1 0 0 0 0 2h5a1 1 0 0 0 0-2H13v-5a1 1 0 0 0-1-1Zm0-4.5a1.5 1.5 0 0 0 0 3l.144-.007A1.5 1.5 0 0 0 12 5.5Z"/></symbol><symbol id="icon-eds-i-journal-medium" viewBox="0 0 24 24"><path d="M18.5 1A2.5 2.5 0 0 1 21 3.5v14a2.5 2.5 0 0 1-2.5 2.5h-13a.5.5 0 1 0 0 1H20a1 1 0 0 1 0 2H5.5A2.5 2.5 0 0 1 3 20.5v-17A2.5 2.5 0 0 1 5.5 1h13ZM7 3H5.5a.5.5 0 0 0-.5.5v14.549l.016-.002c.104-.02.211-.035.32-.042L5.5 18H7V3Zm11.5 0H9v15h9.5a.5.5 0 0 0 .5-.5v-14a.5.5 0 0 0-.5-.5ZM16 5a1 1 0 0 1 1 1v4a1 1 0 0 1-1 1h-5a1 1 0 0 1-1-1V6a1 1 0 0 1 1-1h5Zm-1 2h-3v2h3V7Z"/></symbol><symbol id="icon-eds-i-mail-medium" viewBox="0 0 24 24"><path d="M20.462 3C21.875 3 23 4.184 23 5.619v12.762C23 19.816 21.875 21 20.462 21H3.538C2.125 21 1 19.816 1 18.381V5.619C1 4.184 2.125 3 3.538 3h16.924ZM21 8.158l-7.378 6.258a2.549 2.549 0 0 1-3.253-.008L3 8.16v10.222c0 .353.253.619.538.619h16.924c.285 0 .538-.266.538-.619V8.158ZM20.462 5H3.538c-.264 0-.5.228-.534.542l8.65 7.334c.2.165.492.165.684.007l8.656-7.342-.001-.025c-.044-.3-.274-.516-.531-.516Z"/></symbol><symbol id="icon-eds-i-mail-send-medium" viewBox="0 0 24 24"><path d="M20.444 5a2.562 2.562 0 0 1 2.548 2.37l.007.078.001.123v7.858A2.564 2.564 0 0 1 20.444 18H9.556A2.564 2.564 0 0 1 7 15.429l.001-7.977.007-.082A2.561 2.561 0 0 1 9.556 5h10.888ZM21 9.331l-5.46 3.51a1 1 0 0 1-1.08 0L9 9.332v6.097c0 .317.251.571.556.571h10.888a.564.564 0 0 0 .556-.571V9.33ZM20.444 7H9.556a.543.543 0 0 0-.32.105l5.763 3.706 5.766-3.706a.543.543 0 0 0-.32-.105ZM4.308 5a1 1 0 1 1 0 2H2a1 1 0 1 1 0-2h2.308Zm0 5.5a1 1 0 0 1 0 2H2a1 1 0 0 1 0-2h2.308Zm0 5.5a1 1 0 0 1 0 2H2a1 1 0 0 1 0-2h2.308Z"/></symbol><symbol id="icon-eds-i-mentions-medium" viewBox="0 0 24 24"><path d="m9.452 1.293 5.92 5.92 2.92-2.92a1 1 0 0 1 1.415 1.414l-2.92 2.92 5.92 5.92a1 1 0 0 1 0 1.415 10.371 10.371 0 0 1-10.378 2.584l.652 3.258A1 1 0 0 1 12 23H2a1 1 0 0 1-.874-1.486l4.789-8.62C4.194 9.074 4.9 4.43 8.038 1.292a1 1 0 0 1 1.414 0Zm-2.355 13.59L3.699 21h7.081l-.689-3.442a10.392 10.392 0 0 1-2.775-2.396l-.22-.28Zm1.69-11.427-.07.09a8.374 8.374 0 0 0 11.737 11.737l.089-.071L8.787 3.456Z"/></symbol><symbol id="icon-eds-i-menu-medium" viewBox="0 0 24 24"><path d="M21 4a1 1 0 0 1 0 2H3a1 1 0 1 1 0-2h18Zm-4 7a1 1 0 0 1 0 2H3a1 1 0 0 1 0-2h14Zm4 7a1 1 0 0 1 0 2H3a1 1 0 0 1 0-2h18Z"/></symbol><symbol id="icon-eds-i-metrics-medium" viewBox="0 0 24 24"><path d="M3 22a1 1 0 0 1-1-1V3a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v7h4V8a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v13a1 1 0 0 1-.883.993L21 22H3Zm17-2V9h-4v11h4Zm-6-8h-4v8h4v-8ZM8 4H4v16h4V4Z"/></symbol><symbol id="icon-eds-i-news-medium" viewBox="0 0 24 24"><path d="M17.384 3c.975 0 1.77.787 1.77 1.762v13.333c0 .462.354.846.815.899l.107.006.109-.006a.915.915 0 0 0 .809-.794l.006-.105V8.19a1 1 0 0 1 2 0v9.905A2.914 2.914 0 0 1 20.077 21H3.538a2.547 2.547 0 0 1-1.644-.601l-.147-.135A2.516 2.516 0 0 1 1 18.476V4.762C1 3.787 1.794 3 2.77 3h14.614Zm-.231 2H3v13.476c0 .11.035.216.1.304l.054.063c.101.1.24.157.384.157l13.761-.001-.026-.078a2.88 2.88 0 0 1-.115-.655l-.004-.17L17.153 5ZM14 15.021a.979.979 0 1 1 0 1.958H6a.979.979 0 1 1 0-1.958h8Zm0-8c.54 0 .979.438.979.979v4c0 .54-.438.979-.979.979H6A.979.979 0 0 1 5.021 12V8c0-.54.438-.979.979-.979h8Zm-.98 1.958H6.979v2.041h6.041V8.979Z"/></symbol><symbol id="icon-eds-i-newsletter-medium" viewBox="0 0 24 24"><path d="M21 10a1 1 0 0 1 1 1v9.5a2.5 2.5 0 0 1-2.5 2.5h-15A2.5 2.5 0 0 1 2 20.5V11a1 1 0 0 1 2 0v.439l8 4.888 8-4.889V11a1 1 0 0 1 1-1Zm-1 3.783-7.479 4.57a1 1 0 0 1-1.042 0l-7.48-4.57V20.5a.5.5 0 0 0 .501.5h15a.5.5 0 0 0 .5-.5v-6.717ZM15 9a1 1 0 0 1 0 2H9a1 1 0 0 1 0-2h6Zm2.5-8A2.5 2.5 0 0 1 20 3.5V9a1 1 0 0 1-2 0V3.5a.5.5 0 0 0-.5-.5h-11a.5.5 0 0 0-.5.5V9a1 1 0 1 1-2 0V3.5A2.5 2.5 0 0 1 6.5 1h11ZM15 5a1 1 0 0 1 0 2H9a1 1 0 1 1 0-2h6Z"/></symbol><symbol id="icon-eds-i-notifcation-medium" viewBox="0 0 24 24"><path d="M14 20a1 1 0 0 1 0 2h-4a1 1 0 0 1 0-2h4ZM3 18l-.133-.007c-1.156-.124-1.156-1.862 0-1.986l.3-.012C4.32 15.923 5 15.107 5 14V9.5C5 5.368 8.014 2 12 2s7 3.368 7 7.5V14c0 1.107.68 1.923 1.832 1.995l.301.012c1.156.124 1.156 1.862 0 1.986L21 18H3Zm9-14C9.17 4 7 6.426 7 9.5V14c0 .671-.146 1.303-.416 1.858L6.51 16h10.979l-.073-.142a4.192 4.192 0 0 1-.412-1.658L17 14V9.5C17 6.426 14.83 4 12 4Z"/></symbol><symbol id="icon-eds-i-publish-medium" viewBox="0 0 24 24"><g><path d="M16.296 1.291A1 1 0 0 0 15.591 1H5.545A2.542 2.542 0 0 0 3 3.538V13a1 1 0 1 0 2 0V3.538l.007-.087A.543.543 0 0 1 5.545 3h9.633L20 7.8v12.662a.534.534 0 0 1-.158.379.548.548 0 0 1-.387.159H11a1 1 0 1 0 0 2h8.455c.674 0 1.32-.267 1.798-.742A2.534 2.534 0 0 0 22 20.462V7.385a1 1 0 0 0-.294-.709l-5.41-5.385Z"/><path d="M10.762 16.647a1 1 0 0 0-1.525-1.294l-4.472 5.271-2.153-1.665a1 1 0 1 0-1.224 1.582l2.91 2.25a1 1 0 0 0 1.374-.144l5.09-6ZM16 10a1 1 0 1 1 0 2H8a1 1 0 1 1 0-2h8ZM12 7a1 1 0 0 0-1-1H8a1 1 0 1 0 0 2h3a1 1 0 0 0 1-1Z"/></g></symbol><symbol id="icon-eds-i-refresh-medium" viewBox="0 0 24 24"><g><path d="M7.831 5.636H6.032A8.76 8.76 0 0 1 9 3.631 8.549 8.549 0 0 1 12.232 3c.603 0 1.192.063 1.76.182C17.979 4.017 21 7.632 21 12a1 1 0 1 0 2 0c0-5.296-3.674-9.746-8.591-10.776A10.61 10.61 0 0 0 5 3.851V2.805a1 1 0 0 0-.987-1H4a1 1 0 0 0-1 1v3.831a1 1 0 0 0 1 1h3.831a1 1 0 0 0 .013-2h-.013ZM17.968 18.364c-1.59 1.632-3.784 2.636-6.2 2.636C6.948 21 3 16.993 3 12a1 1 0 1 0-2 0c0 6.053 4.799 11 10.768 11 2.788 0 5.324-1.082 7.232-2.85v1.045a1 1 0 1 0 2 0v-3.831a1 1 0 0 0-1-1h-3.831a1 1 0 0 0 0 2h1.799Z"/></g></symbol><symbol id="icon-eds-i-search-medium" viewBox="0 0 24 24"><path d="M11 1c5.523 0 10 4.477 10 10 0 2.4-.846 4.604-2.256 6.328l3.963 3.965a1 1 0 0 1-1.414 1.414l-3.965-3.963A9.959 9.959 0 0 1 11 21C5.477 21 1 16.523 1 11S5.477 1 11 1Zm0 2a8 8 0 1 0 0 16 8 8 0 0 0 0-16Z"/></symbol><symbol id="icon-eds-i-settings-medium" viewBox="0 0 24 24"><path d="M11.382 1h1.24a2.508 2.508 0 0 1 2.334 1.63l.523 1.378 1.59.933 1.444-.224c.954-.132 1.89.3 2.422 1.101l.095.155.598 1.066a2.56 2.56 0 0 1-.195 2.848l-.894 1.161v1.896l.92 1.163c.6.768.707 1.812.295 2.674l-.09.17-.606 1.08a2.504 2.504 0 0 1-2.531 1.25l-1.428-.223-1.589.932-.523 1.378a2.512 2.512 0 0 1-2.155 1.625L12.65 23h-1.27a2.508 2.508 0 0 1-2.334-1.63l-.524-1.379-1.59-.933-1.443.225c-.954.132-1.89-.3-2.422-1.101l-.095-.155-.598-1.066a2.56 2.56 0 0 1 .195-2.847l.891-1.161v-1.898l-.919-1.162a2.562 2.562 0 0 1-.295-2.674l.09-.17.606-1.08a2.504 2.504 0 0 1 2.531-1.25l1.43.223 1.618-.938.524-1.375.07-.167A2.507 2.507 0 0 1 11.382 1Zm.003 2a.509.509 0 0 0-.47.338l-.65 1.71a1 1 0 0 1-.434.51L7.6 6.85a1 1 0 0 1-.655.123l-1.762-.275a.497.497 0 0 0-.498.252l-.61 1.088a.562.562 0 0 0 .04.619l1.13 1.43a1 1 0 0 1 .216.62v2.585a1 1 0 0 1-.207.61L4.15 15.339a.568.568 0 0 0-.036.634l.601 1.072a.494.494 0 0 0 .484.26l1.78-.278a1 1 0 0 1 .66.126l2.2 1.292a1 1 0 0 1 .43.507l.648 1.71a.508.508 0 0 0 .467.338h1.263a.51.51 0 0 0 .47-.34l.65-1.708a1 1 0 0 1 .428-.507l2.201-1.292a1 1 0 0 1 .66-.126l1.763.275a.497.497 0 0 0 .498-.252l.61-1.088a.562.562 0 0 0-.04-.619l-1.13-1.43a1 1 0 0 1-.216-.62v-2.585a1 1 0 0 1 .207-.61l1.105-1.437a.568.568 0 0 0 .037-.634l-.601-1.072a.494.494 0 0 0-.484-.26l-1.78.278a1 1 0 0 1-.66-.126l-2.2-1.292a1 1 0 0 1-.43-.507l-.649-1.71A.508.508 0 0 0 12.62 3h-1.234ZM12 8a4 4 0 1 1 0 8 4 4 0 0 1 0-8Zm0 2a2 2 0 1 0 0 4 2 2 0 0 0 0-4Z"/></symbol><symbol id="icon-eds-i-shipping-medium" viewBox="0 0 24 24"><path d="M16.515 2c1.406 0 2.706.728 3.352 1.902l2.02 3.635.02.042.036.089.031.105.012.058.01.073.004.075v11.577c0 .64-.244 1.255-.683 1.713a2.356 2.356 0 0 1-1.701.731H4.386a2.356 2.356 0 0 1-1.702-.731 2.476 2.476 0 0 1-.683-1.713V7.948c.01-.217.083-.43.22-.6L4.2 3.905C4.833 2.755 6.089 2.032 7.486 2h9.029ZM20 9H4v10.556a.49.49 0 0 0 .075.26l.053.07a.356.356 0 0 0 .257.114h15.23c.094 0 .186-.04.258-.115a.477.477 0 0 0 .127-.33V9Zm-2 7.5a1 1 0 0 1 0 2h-4a1 1 0 0 1 0-2h4ZM16.514 4H13v3h6.3l-1.183-2.13c-.288-.522-.908-.87-1.603-.87ZM11 3.999H7.51c-.679.017-1.277.36-1.566.887L4.728 7H11V3.999Z"/></symbol><symbol id="icon-eds-i-step-guide-medium" viewBox="0 0 24 24"><path d="M11.394 9.447a1 1 0 1 0-1.788-.894l-.88 1.759-.019-.02a1 1 0 1 0-1.414 1.415l1 1a1 1 0 0 0 1.601-.26l1.5-3ZM12 11a1 1 0 0 1 1-1h3a1 1 0 1 1 0 2h-3a1 1 0 0 1-1-1ZM12 17a1 1 0 0 1 1-1h3a1 1 0 1 1 0 2h-3a1 1 0 0 1-1-1ZM10.947 14.105a1 1 0 0 1 .447 1.342l-1.5 3a1 1 0 0 1-1.601.26l-1-1a1 1 0 1 1 1.414-1.414l.02.019.879-1.76a1 1 0 0 1 1.341-.447Z"/><path d="M5.545 1A2.542 2.542 0 0 0 3 3.538v16.924A2.542 2.542 0 0 0 5.545 23h12.91A2.542 2.542 0 0 0 21 20.462V7.5a1 1 0 0 0-.293-.707l-5.5-5.5A1 1 0 0 0 14.5 1H5.545ZM5 3.538C5 3.245 5.24 3 5.545 3h8.54L19 7.914v12.547c0 .294-.24.539-.546.539H5.545A.542.542 0 0 1 5 20.462V3.538Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-submission-medium" viewBox="0 0 24 24"><g><path d="M5 3.538C5 3.245 5.24 3 5.545 3h9.633L20 7.8v12.662a.535.535 0 0 1-.158.379.549.549 0 0 1-.387.159H6a1 1 0 0 1-1-1v-2.5a1 1 0 1 0-2 0V20a3 3 0 0 0 3 3h13.455c.673 0 1.32-.266 1.798-.742A2.535 2.535 0 0 0 22 20.462V7.385a1 1 0 0 0-.294-.709l-5.41-5.385A1 1 0 0 0 15.591 1H5.545A2.542 2.542 0 0 0 3 3.538V7a1 1 0 0 0 2 0V3.538Z"/><path d="m13.707 13.707-4 4a1 1 0 0 1-1.414 0l-.083-.094a1 1 0 0 1 .083-1.32L10.585 14 2 14a1 1 0 1 1 0-2l8.583.001-2.29-2.294a1 1 0 0 1 1.414-1.414l4.037 4.04.043.05.043.06.059.098.03.063.031.085.03.113.017.122L14 13l-.004.087-.017.118-.013.056-.034.104-.049.105-.048.081-.07.093-.058.063Z"/></g></symbol><symbol id="icon-eds-i-table-1-medium" viewBox="0 0 24 24"><path d="M4.385 22a2.56 2.56 0 0 1-1.14-.279C2.485 21.341 2 20.614 2 19.615V4.385c0-.315.067-.716.279-1.14C2.659 2.485 3.386 2 4.385 2h15.23c.315 0 .716.067 1.14.279.76.38 1.245 1.107 1.245 2.106v15.23c0 .315-.067.716-.279 1.14-.38.76-1.107 1.245-2.106 1.245H4.385ZM4 19.615c0 .213.034.265.14.317a.71.71 0 0 0 .245.068H8v-4H4v3.615ZM20 16H10v4h9.615c.213 0 .265-.034.317-.14a.71.71 0 0 0 .068-.245V16Zm0-2v-4H10v4h10ZM4 14h4v-4H4v4ZM19.615 4H10v4h10V4.385c0-.213-.034-.265-.14-.317A.71.71 0 0 0 19.615 4ZM8 4H4.385l-.082.002c-.146.01-.19.047-.235.138A.71.71 0 0 0 4 4.385V8h4V4Z"/></symbol><symbol id="icon-eds-i-table-2-medium" viewBox="0 0 24 24"><path d="M4.384 22A2.384 2.384 0 0 1 2 19.616V4.384A2.384 2.384 0 0 1 4.384 2h15.232A2.384 2.384 0 0 1 22 4.384v15.232A2.384 2.384 0 0 1 19.616 22H4.384ZM10 15H4v4.616c0 .212.172.384.384.384H10v-5Zm5 0h-3v5h3v-5Zm5 0h-3v5h2.616a.384.384 0 0 0 .384-.384V15ZM10 9H4v4h6V9Zm5 0h-3v4h3V9Zm5 0h-3v4h3V9Zm-.384-5H4.384A.384.384 0 0 0 4 4.384V7h16V4.384A.384.384 0 0 0 19.616 4Z"/></symbol><symbol id="icon-eds-i-tag-medium" viewBox="0 0 24 24"><path d="m12.621 1.998.127.004L20.496 2a1.5 1.5 0 0 1 1.497 1.355L22 3.5l-.005 7.669c.038.456-.133.905-.447 1.206l-9.02 9.018a2.075 2.075 0 0 1-2.932 0l-6.99-6.99a2.075 2.075 0 0 1 .001-2.933L11.61 2.47c.246-.258.573-.418.881-.46l.131-.011Zm.286 2-8.885 8.886a.075.075 0 0 0 0 .106l6.987 6.988c.03.03.077.03.106 0l8.883-8.883L19.999 4l-7.092-.002ZM16 6.5a1.5 1.5 0 0 1 .144 2.993L16 9.5a1.5 1.5 0 0 1 0-3Z"/></symbol><symbol id="icon-eds-i-trash-medium" viewBox="0 0 24 24"><path d="M12 1c2.717 0 4.913 2.232 4.997 5H21a1 1 0 0 1 0 2h-1v12.5c0 1.389-1.152 2.5-2.556 2.5H6.556C5.152 23 4 21.889 4 20.5V8H3a1 1 0 1 1 0-2h4.003l.001-.051C7.114 3.205 9.3 1 12 1Zm6 7H6v12.5c0 .238.19.448.454.492l.102.008h10.888c.315 0 .556-.232.556-.5V8Zm-4 3a1 1 0 0 1 1 1v6.005a1 1 0 0 1-2 0V12a1 1 0 0 1 1-1Zm-4 0a1 1 0 0 1 1 1v6a1 1 0 0 1-2 0v-6a1 1 0 0 1 1-1Zm2-8c-1.595 0-2.914 1.32-2.996 3h5.991v-.02C14.903 4.31 13.589 3 12 3Z"/></symbol><symbol id="icon-eds-i-user-account-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 16c-1.806 0-3.52.994-4.664 2.698A8.947 8.947 0 0 0 12 21a8.958 8.958 0 0 0 4.664-1.301C15.52 17.994 13.806 17 12 17Zm0-14a9 9 0 0 0-6.25 15.476C7.253 16.304 9.54 15 12 15s4.747 1.304 6.25 3.475A9 9 0 0 0 12 3Zm0 3a4 4 0 1 1 0 8 4 4 0 0 1 0-8Zm0 2a2 2 0 1 0 0 4 2 2 0 0 0 0-4Z"/></symbol><symbol id="icon-eds-i-user-add-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm9 10a1 1 0 0 1 1 1v3h3a1 1 0 0 1 0 2h-3v3a1 1 0 0 1-2 0v-3h-3a1 1 0 0 1 0-2h3v-3a1 1 0 0 1 1-1Zm-5.545-.15a1 1 0 1 1-.91 1.78 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 11.5 20a1 1 0 0 1 .993.883L12.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378Z"/></symbol><symbol id="icon-eds-i-user-assign-medium" viewBox="0 0 24 24"><path d="M16.226 13.298a1 1 0 0 1 1.414-.01l.084.093a1 1 0 0 1-.073 1.32L15.39 17H22a1 1 0 0 1 0 2h-6.611l2.262 2.298a1 1 0 0 1-1.425 1.404l-3.939-4a1 1 0 0 1 0-1.404l3.94-4Zm-3.771-.449a1 1 0 1 1-.91 1.781 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 10.5 20a1 1 0 0 1 .993.883L11.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378ZM9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Z"/></symbol><symbol id="icon-eds-i-user-block-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm9 10a5 5 0 1 1 0 10 5 5 0 0 1 0-10Zm-5.545-.15a1 1 0 1 1-.91 1.78 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 11.5 20a1 1 0 0 1 .993.883L12.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378ZM15 18a3 3 0 0 0 4.294 2.707l-4.001-4c-.188.391-.293.83-.293 1.293Zm3-3c-.463 0-.902.105-1.294.293l4.001 4A3 3 0 0 0 18 15Z"/></symbol><symbol id="icon-eds-i-user-check-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm13.647 12.237a1 1 0 0 1 .116 1.41l-5.091 6a1 1 0 0 1-1.375.144l-2.909-2.25a1 1 0 1 1 1.224-1.582l2.153 1.665 4.472-5.271a1 1 0 0 1 1.41-.116Zm-8.139-.977c.22.214.428.44.622.678a1 1 0 1 1-1.548 1.266 6.025 6.025 0 0 0-1.795-1.49.86.86 0 0 1-.163-.048l-.079-.036a5.721 5.721 0 0 0-2.62-.63l-.194.006c-2.76.134-5.022 2.177-5.592 4.864l-.035.175-.035.213c-.03.201-.05.405-.06.61L3.003 20 10 20a1 1 0 0 1 .993.883L11 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876l.005-.223.02-.356.02-.222.03-.248.022-.15c.02-.133.044-.265.071-.397.44-2.178 1.725-4.105 3.595-5.301a7.75 7.75 0 0 1 3.755-1.215l.12-.004a7.908 7.908 0 0 1 5.87 2.252Z"/></symbol><symbol id="icon-eds-i-user-delete-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6ZM4.763 13.227a7.713 7.713 0 0 1 7.692-.378 1 1 0 1 1-.91 1.781 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20H11.5a1 1 0 0 1 .993.883L12.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897Zm11.421 1.543 2.554 2.553 2.555-2.553a1 1 0 0 1 1.414 1.414l-2.554 2.554 2.554 2.555a1 1 0 0 1-1.414 1.414l-2.555-2.554-2.554 2.554a1 1 0 0 1-1.414-1.414l2.553-2.555-2.553-2.554a1 1 0 0 1 1.414-1.414Z"/></symbol><symbol id="icon-eds-i-user-edit-medium" viewBox="0 0 24 24"><path d="m19.876 10.77 2.831 2.83a1 1 0 0 1 0 1.415l-7.246 7.246a1 1 0 0 1-.572.284l-3.277.446a1 1 0 0 1-1.125-1.13l.461-3.277a1 1 0 0 1 .283-.567l7.23-7.246a1 1 0 0 1 1.415-.001Zm-7.421 2.08a1 1 0 1 1-.91 1.78 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 7.5 20a1 1 0 0 1 .993.883L8.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378Zm6.715.042-6.29 6.3-.23 1.639 1.633-.222 6.302-6.302-1.415-1.415ZM9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Z"/></symbol><symbol id="icon-eds-i-user-linked-medium" viewBox="0 0 24 24"><path d="M15.65 6c.31 0 .706.066 1.122.274C17.522 6.65 18 7.366 18 8.35v12.3c0 .31-.066.706-.274 1.122-.375.75-1.092 1.228-2.076 1.228H3.35a2.52 2.52 0 0 1-1.122-.274C1.478 22.35 1 21.634 1 20.65V8.35c0-.31.066-.706.274-1.122C1.65 6.478 2.366 6 3.35 6h12.3Zm0 2-12.376.002c-.134.007-.17.04-.21.12A.672.672 0 0 0 3 8.35v12.3c0 .198.028.24.122.287.09.044.2.063.228.063h.887c.788-2.269 2.814-3.5 5.263-3.5 2.45 0 4.475 1.231 5.263 3.5h.887c.198 0 .24-.028.287-.122.044-.09.063-.2.063-.228V8.35c0-.198-.028-.24-.122-.287A.672.672 0 0 0 15.65 8ZM9.5 19.5c-1.36 0-2.447.51-3.06 1.5h6.12c-.613-.99-1.7-1.5-3.06-1.5ZM20.65 1A2.35 2.35 0 0 1 23 3.348V15.65A2.35 2.35 0 0 1 20.65 18H20a1 1 0 0 1 0-2h.65a.35.35 0 0 0 .35-.35V3.348A.35.35 0 0 0 20.65 3H8.35a.35.35 0 0 0-.35.348V4a1 1 0 1 1-2 0v-.652A2.35 2.35 0 0 1 8.35 1h12.3ZM9.5 10a3.5 3.5 0 1 1 0 7 3.5 3.5 0 0 1 0-7Zm0 2a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3Z"/></symbol><symbol id="icon-eds-i-user-multiple-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm6 0a5 5 0 0 1 0 10 1 1 0 0 1-.117-1.993L15 9a3 3 0 0 0 0-6 1 1 0 0 1 0-2ZM9 3a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm8.857 9.545a7.99 7.99 0 0 1 2.651 1.715A8.31 8.31 0 0 1 23 20.134V21a1 1 0 0 1-1 1h-3a1 1 0 0 1 0-2h1.995l-.005-.153a6.307 6.307 0 0 0-1.673-3.945l-.204-.209a5.99 5.99 0 0 0-1.988-1.287 1 1 0 1 1 .732-1.861Zm-3.349 1.715A8.31 8.31 0 0 1 17 20.134V21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.877c.044-4.343 3.387-7.908 7.638-8.115a7.908 7.908 0 0 1 5.87 2.252ZM9.016 14l-.285.006c-3.104.15-5.58 2.718-5.725 5.9L3.004 20h11.991l-.005-.153a6.307 6.307 0 0 0-1.673-3.945l-.204-.209A5.924 5.924 0 0 0 9.3 14.008L9.016 14Z"/></symbol><symbol id="icon-eds-i-user-notify-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm10 18v1a1 1 0 0 1-2 0v-1h-3a1 1 0 0 1 0-2v-2.818C14 13.885 15.777 12 18 12s4 1.885 4 4.182V19a1 1 0 0 1 0 2h-3Zm-6.545-8.15a1 1 0 1 1-.91 1.78 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 11.5 20a1 1 0 0 1 .993.883L12.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378ZM18 14c-1.091 0-2 .964-2 2.182V19h4v-2.818c0-1.165-.832-2.098-1.859-2.177L18 14Z"/></symbol><symbol id="icon-eds-i-user-remove-medium" viewBox="0 0 24 24"><path d="M9 1a5 5 0 1 1 0 10A5 5 0 0 1 9 1Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm3.455 9.85a1 1 0 1 1-.91 1.78 5.713 5.713 0 0 0-5.705.282c-1.67 1.068-2.728 2.927-2.832 4.956L3.004 20 11.5 20a1 1 0 0 1 .993.883L12.5 21a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1v-.876c.028-2.812 1.446-5.416 3.763-6.897a7.713 7.713 0 0 1 7.692-.378ZM22 17a1 1 0 0 1 0 2h-8a1 1 0 0 1 0-2h8Z"/></symbol><symbol id="icon-eds-i-user-single-medium" viewBox="0 0 24 24"><path d="M12 1a5 5 0 1 1 0 10 5 5 0 0 1 0-10Zm0 2a3 3 0 1 0 0 6 3 3 0 0 0 0-6Zm-.406 9.008a8.965 8.965 0 0 1 6.596 2.494A9.161 9.161 0 0 1 21 21.025V22a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1v-.985c.05-4.825 3.815-8.777 8.594-9.007Zm.39 1.992-.299.006c-3.63.175-6.518 3.127-6.678 6.775L5 21h13.998l-.009-.268a7.157 7.157 0 0 0-1.97-4.573l-.214-.213A6.967 6.967 0 0 0 11.984 14Z"/></symbol><symbol id="icon-eds-i-warning-circle-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 2a9 9 0 1 0 0 18 9 9 0 0 0 0-18Zm0 11.5a1.5 1.5 0 0 1 .144 2.993L12 17.5a1.5 1.5 0 0 1 0-3ZM12 6a1 1 0 0 1 1 1v5a1 1 0 0 1-2 0V7a1 1 0 0 1 1-1Z"/></symbol><symbol id="icon-eds-i-warning-filled-medium" viewBox="0 0 24 24"><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1Zm0 13.5a1.5 1.5 0 0 0 0 3l.144-.007A1.5 1.5 0 0 0 12 14.5ZM12 6a1 1 0 0 0-1 1v5a1 1 0 0 0 2 0V7a1 1 0 0 0-1-1Z"/></symbol><symbol id="icon-chevron-left-medium" viewBox="0 0 24 24"><path d="M15.7194 3.3054C15.3358 2.90809 14.7027 2.89699 14.3054 3.28061L6.54342 10.7757C6.19804 11.09 6 11.5335 6 12C6 12.4665 6.19804 12.91 6.5218 13.204L14.3054 20.7194C14.7027 21.103 15.3358 21.0919 15.7194 20.6946C16.103 20.2973 16.0919 19.6642 15.6946 19.2806L8.155 12L15.6946 4.71939C16.0614 4.36528 16.099 3.79863 15.8009 3.40105L15.7194 3.3054Z"/></symbol><symbol id="icon-chevron-right-medium" viewBox="0 0 24 24"><path d="M8.28061 3.3054C8.66423 2.90809 9.29729 2.89699 9.6946 3.28061L17.4566 10.7757C17.802 11.09 18 11.5335 18 12C18 12.4665 17.802 12.91 17.4782 13.204L9.6946 20.7194C9.29729 21.103 8.66423 21.0919 8.28061 20.6946C7.89699 20.2973 7.90809 19.6642 8.3054 19.2806L15.845 12L8.3054 4.71939C7.93865 4.36528 7.90098 3.79863 8.19908 3.40105L8.28061 3.3054Z"/></symbol><symbol id="icon-eds-alerts" viewBox="0 0 32 32"><path d="M28 12.667c.736 0 1.333.597 1.333 1.333v13.333A3.333 3.333 0 0 1 26 30.667H6a3.333 3.333 0 0 1-3.333-3.334V14a1.333 1.333 0 1 1 2.666 0v1.252L16 21.769l10.667-6.518V14c0-.736.597-1.333 1.333-1.333Zm-1.333 5.71-9.972 6.094c-.427.26-.963.26-1.39 0l-9.972-6.094v8.956c0 .368.299.667.667.667h20a.667.667 0 0 0 .667-.667v-8.956ZM19.333 12a1.333 1.333 0 1 1 0 2.667h-6.666a1.333 1.333 0 1 1 0-2.667h6.666Zm4-10.667a3.333 3.333 0 0 1 3.334 3.334v6.666a1.333 1.333 0 1 1-2.667 0V4.667A.667.667 0 0 0 23.333 4H8.667A.667.667 0 0 0 8 4.667v6.666a1.333 1.333 0 1 1-2.667 0V4.667a3.333 3.333 0 0 1 3.334-3.334h14.666Zm-4 5.334a1.333 1.333 0 0 1 0 2.666h-6.666a1.333 1.333 0 1 1 0-2.666h6.666Z"/></symbol><symbol id="icon-eds-arrow-up" viewBox="0 0 24 24"><path fill-rule="evenodd" d="m13.002 7.408 4.88 4.88a.99.99 0 0 0 1.32.08l.09-.08c.39-.39.39-1.03 0-1.42l-6.58-6.58a1.01 1.01 0 0 0-1.42 0l-6.58 6.58a1 1 0 0 0-.09 1.32l.08.1a1 1 0 0 0 1.42-.01l4.88-4.87v11.59a.99.99 0 0 0 .88.99l.12.01c.55 0 1-.45 1-1V7.408z" class="layer"/></symbol><symbol id="icon-eds-checklist" viewBox="0 0 32 32"><path d="M19.2 1.333a3.468 3.468 0 0 1 3.381 2.699L24.667 4C26.515 4 28 5.52 28 7.38v19.906c0 1.86-1.485 3.38-3.333 3.38H7.333c-1.848 0-3.333-1.52-3.333-3.38V7.38C4 5.52 5.485 4 7.333 4h2.093A3.468 3.468 0 0 1 12.8 1.333h6.4ZM9.426 6.667H7.333c-.36 0-.666.312-.666.713v19.906c0 .401.305.714.666.714h17.334c.36 0 .666-.313.666-.714V7.38c0-.4-.305-.713-.646-.714l-2.121.033A3.468 3.468 0 0 1 19.2 9.333h-6.4a3.468 3.468 0 0 1-3.374-2.666Zm12.715 5.606c.586.446.7 1.283.253 1.868l-7.111 9.334a1.333 1.333 0 0 1-1.792.306l-3.556-2.333a1.333 1.333 0 1 1 1.463-2.23l2.517 1.651 6.358-8.344a1.333 1.333 0 0 1 1.868-.252ZM19.2 4h-6.4a.8.8 0 0 0-.8.8v1.067a.8.8 0 0 0 .8.8h6.4a.8.8 0 0 0 .8-.8V4.8a.8.8 0 0 0-.8-.8Z"/></symbol><symbol id="icon-eds-citation" viewBox="0 0 36 36"><path d="M23.25 1.5a1.5 1.5 0 0 1 1.06.44l8.25 8.25a1.5 1.5 0 0 1 .44 1.06v19.5c0 2.105-1.645 3.75-3.75 3.75H18a1.5 1.5 0 0 1 0-3h11.25c.448 0 .75-.302.75-.75V11.873L22.628 4.5H8.31a.811.811 0 0 0-.8.68l-.011.13V16.5a1.5 1.5 0 0 1-3 0V5.31A3.81 3.81 0 0 1 8.31 1.5h14.94ZM8.223 20.358a.984.984 0 0 1-.192 1.378l-.048.034c-.54.36-.942.676-1.206.951-.59.614-.885 1.395-.885 2.343.115-.028.288-.042.518-.042.662 0 1.26.237 1.791.711.533.474.799 1.074.799 1.799 0 .753-.259 1.352-.777 1.799-.518.446-1.151.669-1.9.669-1.006 0-1.812-.293-2.417-.878C3.302 28.536 3 27.657 3 26.486c0-1.115.165-2.085.496-2.907.331-.823.734-1.513 1.209-2.071.475-.558.971-.997 1.49-1.318a6.01 6.01 0 0 1 .347-.2 1.321 1.321 0 0 1 1.681.368Zm7.5 0a.984.984 0 0 1-.192 1.378l-.048.034c-.54.36-.942.676-1.206.951-.59.614-.885 1.395-.885 2.343.115-.028.288-.042.518-.042.662 0 1.26.237 1.791.711.533.474.799 1.074.799 1.799 0 .753-.259 1.352-.777 1.799-.518.446-1.151.669-1.9.669-1.006 0-1.812-.293-2.417-.878-.604-.586-.906-1.465-.906-2.636 0-1.115.165-2.085.496-2.907.331-.823.734-1.513 1.209-2.071.475-.558.971-.997 1.49-1.318a6.01 6.01 0 0 1 .347-.2 1.321 1.321 0 0 1 1.681.368Z"/></symbol><symbol id="icon-eds-i-access-indicator" viewBox="0 0 16 16"><circle cx="4.5" cy="11.5" r="3.5" style="fill:currentColor"/><path fill-rule="evenodd" d="M4 3v3a1 1 0 0 1-2 0V2.923C2 1.875 2.84 1 3.909 1h5.909a1 1 0 0 1 .713.298l3.181 3.231a1 1 0 0 1 .288.702v7.846c0 .505-.197.993-.554 1.354a1.902 1.902 0 0 1-1.355.569H10a1 1 0 1 1 0-2h2V5.64L9.4 3H4Z" clip-rule="evenodd" style="fill:#222"/></symbol><symbol id="icon-eds-i-github-medium" viewBox="0 0 24 24"><path d="M 11.964844 0 C 5.347656 0 0 5.269531 0 11.792969 C 0 17.003906 3.425781 21.417969 8.179688 22.976562 C 8.773438 23.09375 8.992188 22.722656 8.992188 22.410156 C 8.992188 22.136719 8.972656 21.203125 8.972656 20.226562 C 5.644531 20.929688 4.953125 18.820312 4.953125 18.820312 C 4.417969 17.453125 3.625 17.101562 3.625 17.101562 C 2.535156 16.378906 3.703125 16.378906 3.703125 16.378906 C 4.914062 16.457031 5.546875 17.589844 5.546875 17.589844 C 6.617188 19.386719 8.339844 18.878906 9.03125 18.566406 C 9.132812 17.804688 9.449219 17.277344 9.785156 16.984375 C 7.132812 16.710938 4.339844 15.695312 4.339844 11.167969 C 4.339844 9.878906 4.8125 8.824219 5.566406 8.003906 C 5.445312 7.710938 5.03125 6.5 5.683594 4.878906 C 5.683594 4.878906 6.695312 4.566406 8.972656 6.089844 C 9.949219 5.832031 10.953125 5.703125 11.964844 5.699219 C 12.972656 5.699219 14.003906 5.835938 14.957031 6.089844 C 17.234375 4.566406 18.242188 4.878906 18.242188 4.878906 C 18.898438 6.5 18.480469 7.710938 18.363281 8.003906 C 19.136719 8.824219 19.589844 9.878906 19.589844 11.167969 C 19.589844 15.695312 16.796875 16.691406 14.125 16.984375 C 14.558594 17.355469 14.933594 18.058594 14.933594 19.171875 C 14.933594 20.753906 14.914062 22.019531 14.914062 22.410156 C 14.914062 22.722656 15.132812 23.09375 15.726562 22.976562 C 20.480469 21.414062 23.910156 17.003906 23.910156 11.792969 C 23.929688 5.269531 18.558594 0 11.964844 0 Z M 11.964844 0 "/></symbol><symbol id="icon-eds-i-limited-access" viewBox="0 0 16 16"><path fill-rule="evenodd" d="M4 3v3a1 1 0 0 1-2 0V2.923C2 1.875 2.84 1 3.909 1h5.909a1 1 0 0 1 .713.298l3.181 3.231a1 1 0 0 1 .288.702V6a1 1 0 1 1-2 0v-.36L9.4 3H4ZM3 8a1 1 0 0 1 1 1v1a1 1 0 1 1-2 0V9a1 1 0 0 1 1-1Zm10 0a1 1 0 0 1 1 1v1a1 1 0 1 1-2 0V9a1 1 0 0 1 1-1Zm-3.5 6a1 1 0 0 1-1 1h-1a1 1 0 1 1 0-2h1a1 1 0 0 1 1 1Zm2.441-1a1 1 0 0 1 2 0c0 .73-.246 1.306-.706 1.664a1.61 1.61 0 0 1-.876.334l-.032.002H11.5a1 1 0 1 1 0-2h.441ZM4 13a1 1 0 0 0-2 0c0 .73.247 1.306.706 1.664a1.609 1.609 0 0 0 .876.334l.032.002H4.5a1 1 0 1 0 0-2H4Z" clip-rule="evenodd"/></symbol><symbol id="icon-eds-i-subjects-medium" viewBox="0 0 24 24"><g id="icon-subjects-copy" stroke="none" stroke-width="1" fill-rule="evenodd"><path d="M13.3846154,2 C14.7015971,2 15.7692308,3.06762994 15.7692308,4.38461538 L15.7692308,7.15384615 C15.7692308,8.47082629 14.7015955,9.53846154 13.3846154,9.53846154 L13.1038388,9.53925278 C13.2061091,9.85347965 13.3815528,10.1423885 13.6195822,10.3804178 C13.9722182,10.7330539 14.436524,10.9483278 14.9293854,10.9918129 L15.1153846,11 C16.2068332,11 17.2535347,11.433562 18.0254647,12.2054189 C18.6411944,12.8212361 19.0416785,13.6120766 19.1784166,14.4609738 L19.6153846,14.4615385 C20.932386,14.4615385 22,15.5291672 22,16.8461538 L22,19.6153846 C22,20.9323924 20.9323924,22 19.6153846,22 L16.8461538,22 C15.5291672,22 14.4615385,20.932386 14.4615385,19.6153846 L14.4615385,16.8461538 C14.4615385,15.5291737 15.5291737,14.4615385 16.8461538,14.4615385 L17.126925,14.460779 C17.0246537,14.1465537 16.8492179,13.857633 16.6112344,13.6196157 C16.2144418,13.2228606 15.6764136,13 15.1153846,13 C14.0239122,13 12.9771569,12.5664197 12.2053686,11.7946314 C12.1335167,11.7227795 12.0645962,11.6485444 11.9986839,11.5721119 C11.9354038,11.6485444 11.8664833,11.7227795 11.7946314,11.7946314 C11.0228431,12.5664197 9.97608778,13 8.88461538,13 C8.323576,13 7.78552852,13.2228666 7.38881294,13.6195822 C7.15078359,13.8576115 6.97533988,14.1465203 6.8730696,14.4607472 L7.15384615,14.4615385 C8.47082629,14.4615385 9.53846154,15.5291737 9.53846154,16.8461538 L9.53846154,19.6153846 C9.53846154,20.932386 8.47083276,22 7.15384615,22 L4.38461538,22 C3.06762347,22 2,20.9323876 2,19.6153846 L2,16.8461538 C2,15.5291721 3.06762994,14.4615385 4.38461538,14.4615385 L4.8215823,14.4609378 C4.95831893,13.6120029 5.3588057,12.8211623 5.97459937,12.2053686 C6.69125996,11.488708 7.64500941,11.0636656 8.6514968,11.0066017 L8.88461538,11 C9.44565477,11 9.98370225,10.7771334 10.3804178,10.3804178 C10.6184472,10.1423885 10.7938909,9.85347965 10.8961612,9.53925278 L10.6153846,9.53846154 C9.29840448,9.53846154 8.23076923,8.47082629 8.23076923,7.15384615 L8.23076923,4.38461538 C8.23076923,3.06762994 9.29840286,2 10.6153846,2 L13.3846154,2 Z M7.15384615,16.4615385 L4.38461538,16.4615385 C4.17220099,16.4615385 4,16.63374 4,16.8461538 L4,19.6153846 C4,19.8278134 4.17218833,20 4.38461538,20 L7.15384615,20 C7.36626945,20 7.53846154,19.8278103 7.53846154,19.6153846 L7.53846154,16.8461538 C7.53846154,16.6337432 7.36625679,16.4615385 7.15384615,16.4615385 Z M19.6153846,16.4615385 L16.8461538,16.4615385 C16.6337432,16.4615385 16.4615385,16.6337432 16.4615385,16.8461538 L16.4615385,19.6153846 C16.4615385,19.8278103 16.6337306,20 16.8461538,20 L19.6153846,20 C19.8278229,20 20,19.8278229 20,19.6153846 L20,16.8461538 C20,16.6337306 19.8278103,16.4615385 19.6153846,16.4615385 Z M13.3846154,4 L10.6153846,4 C10.4029708,4 10.2307692,4.17220099 10.2307692,4.38461538 L10.2307692,7.15384615 C10.2307692,7.36625679 10.402974,7.53846154 10.6153846,7.53846154 L13.3846154,7.53846154 C13.597026,7.53846154 13.7692308,7.36625679 13.7692308,7.15384615 L13.7692308,4.38461538 C13.7692308,4.17220099 13.5970292,4 13.3846154,4 Z" id="Shape" fill-rule="nonzero"/></g></symbol><symbol id="icon-eds-small-arrow-left" viewBox="0 0 16 17"><path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14 8.092H2m0 0L8 2M2 8.092l6 6.035"/></symbol><symbol id="icon-eds-small-arrow-right" viewBox="0 0 16 16"><g fill-rule="evenodd" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"><path d="M2 8.092h12M8 2l6 6.092M8 14.127l6-6.035"/></g></symbol><symbol id="icon-orcid-logo" viewBox="0 0 40 40"><path fill-rule="evenodd" d="M12.281 10.453c.875 0 1.578-.719 1.578-1.578 0-.86-.703-1.578-1.578-1.578-.875 0-1.578.703-1.578 1.578 0 .86.703 1.578 1.578 1.578Zm-1.203 18.641h2.406V12.359h-2.406v16.735Z"/><path fill-rule="evenodd" d="M17.016 12.36h6.5c6.187 0 8.906 4.421 8.906 8.374 0 4.297-3.36 8.375-8.875 8.375h-6.531V12.36Zm6.234 14.578h-3.828V14.53h3.703c4.688 0 6.828 2.844 6.828 6.203 0 2.063-1.25 6.203-6.703 6.203Z" clip-rule="evenodd"/></symbol></svg> </div> <a class="c-skip-link" href="#main">Skip to main content</a> <header class="eds-c-header" data-eds-c-header> <div class="eds-c-header__container" data-eds-c-header-expander-anchor> <div class="eds-c-header__brand"> <a href="https://link.springer.com" data-test=springerlink-logo data-track="click_imprint_logo" data-track-context="unified header" data-track-action="click logo link" data-track-category="unified header" data-track-label="link" > <img src="/oscar-static/images/darwin/header/img/logo-springer-nature-link-3149409f62.svg" alt="Springer Nature Link"> </a> </div> <a class="c-header__link eds-c-header__link" id="identity-account-widget" href='https://idp.springer.com/auth/personal/springernature?redirect_uri=https://link.springer.com/article/10.1023/B:PRES.0000030657.88242.e1?'><span class="eds-c-header__widget-fragment-title">Log in</span></a> </div> <nav class="eds-c-header__nav" aria-label="header navigation"> <div class="eds-c-header__nav-container"> <div class="eds-c-header__item eds-c-header__item--menu"> <a href="#eds-c-header-nav" class="eds-c-header__link" data-eds-c-header-expander> <svg class="eds-c-header__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-menu-medium"></use> </svg><span>Menu</span> </a> </div> <div class="eds-c-header__item eds-c-header__item--inline-links"> <a class="eds-c-header__link" href="https://link.springer.com/journals/" data-track="nav_find_a_journal" data-track-context="unified header" data-track-action="click find a journal" data-track-category="unified header" data-track-label="link" > Find a journal </a> <a class="eds-c-header__link" href="https://www.springernature.com/gp/authors" data-track="nav_how_to_publish" data-track-context="unified header" data-track-action="click publish with us link" data-track-category="unified header" data-track-label="link" > Publish with us </a> <a class="eds-c-header__link" href="https://link.springernature.com/home/" data-track="nav_track_your_research" data-track-context="unified header" data-track-action="click track your research" data-track-category="unified header" data-track-label="link" > Track your research </a> </div> <div class="eds-c-header__link-container"> <div class="eds-c-header__item eds-c-header__item--divider"> <a href="#eds-c-header-popup-search" class="eds-c-header__link" data-eds-c-header-expander data-eds-c-header-test-search-btn> <svg class="eds-c-header__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-search-medium"></use> </svg><span>Search</span> </a> </div> <div id="ecommerce-header-cart-icon-link" class="eds-c-header__item ecommerce-cart" style="display:inline-block"> <a class="eds-c-header__link" href="https://order.springer.com/public/cart" style="appearance:none;border:none;background:none;color:inherit;position:relative"> <svg id="eds-i-cart" class="eds-c-header__icon" xmlns="http://www.w3.org/2000/svg" height="24" width="24" viewBox="0 0 24 24" aria-hidden="true" focusable="false"> <path fill="currentColor" fill-rule="nonzero" d="M2 1a1 1 0 0 0 0 2l1.659.001 2.257 12.808a2.599 2.599 0 0 0 2.435 2.185l.167.004 9.976-.001a2.613 2.613 0 0 0 2.61-1.748l.03-.106 1.755-7.82.032-.107a2.546 2.546 0 0 0-.311-1.986l-.108-.157a2.604 2.604 0 0 0-2.197-1.076L6.042 5l-.56-3.17a1 1 0 0 0-.864-.82l-.12-.007L2.001 1ZM20.35 6.996a.63.63 0 0 1 .54.26.55.55 0 0 1 .082.505l-.028.1L19.2 15.63l-.022.05c-.094.177-.282.299-.526.317l-10.145.002a.61.61 0 0 1-.618-.515L6.394 6.999l13.955-.003ZM18 19a2 2 0 1 0 0 4 2 2 0 0 0 0-4ZM8 19a2 2 0 1 0 0 4 2 2 0 0 0 0-4Z"></path> </svg><span>Cart</span><span class="cart-info" style="display:none;position:absolute;top:10px;right:45px;background-color:#C65301;color:#fff;width:18px;height:18px;font-size:11px;border-radius:50%;line-height:17.5px;text-align:center"></span></a> <script>(function () { var exports = {}; if (window.fetch) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.headerWidgetClientInit = void 0; var headerWidgetClientInit = function (getCartInfo) { document.body.addEventListener("updatedCart", function () { updateCartIcon(); }, false); return updateCartIcon(); function updateCartIcon() { return getCartInfo() .then(function (res) { return res.json(); }) .then(refreshCartState) .catch(function (_) { }); } function refreshCartState(json) { var indicator = document.querySelector("#ecommerce-header-cart-icon-link .cart-info"); /* istanbul ignore else */ if (indicator && json.itemCount) { indicator.style.display = 'block'; indicator.textContent = json.itemCount > 9 ? '9+' : json.itemCount.toString(); var moreThanOneItem = json.itemCount > 1; indicator.setAttribute('title', "there ".concat(moreThanOneItem ? "are" : "is", " ").concat(json.itemCount, " item").concat(moreThanOneItem ? "s" : "", " in your cart")); } return json; } }; exports.headerWidgetClientInit = headerWidgetClientInit; headerWidgetClientInit( function () { return window.fetch("https://cart.springer.com/cart-info", { credentials: "include", headers: { Accept: "application/json" } }) } ) }})()</script> </div> </div> </div> </nav> </header> <article lang="en" id="main" class="app-masthead__colour-18"> <section class="app-masthead " aria-label="article masthead"> <div class="app-masthead__container"> <div class="app-article-masthead u-sans-serif js-context-bar-sticky-point-masthead" data-track-component="article" data-test="masthead-component"> <div class="app-article-masthead__info"> <nav aria-label="breadcrumbs" data-test="breadcrumbs"> <ol class="c-breadcrumbs c-breadcrumbs--contrast" itemscope itemtype="https://schema.org/BreadcrumbList"> <li class="c-breadcrumbs__item" id="breadcrumb0" itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem"> <a href="/" class="c-breadcrumbs__link" itemprop="item" data-track="click_breadcrumb" data-track-context="article page" data-track-category="article" data-track-action="breadcrumbs" data-track-label="breadcrumb1"><span itemprop="name">Home</span></a><meta itemprop="position" content="1"> <svg class="c-breadcrumbs__chevron" role="img" aria-hidden="true" focusable="false" width="10" height="10" viewBox="0 0 10 10"> <path d="m5.96738168 4.70639573 2.39518594-2.41447274c.37913917-.38219212.98637524-.38972225 1.35419292-.01894278.37750606.38054586.37784436.99719163-.00013556 1.37821513l-4.03074001 4.06319683c-.37758093.38062133-.98937525.38100976-1.367372-.00003075l-4.03091981-4.06337806c-.37759778-.38063832-.38381821-.99150444-.01600053-1.3622839.37750607-.38054587.98772445-.38240057 1.37006824.00302197l2.39538588 2.4146743.96295325.98624457z" fill-rule="evenodd" transform="matrix(0 -1 1 0 0 10)"/> </svg> </li> <li class="c-breadcrumbs__item" id="breadcrumb1" itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem"> <a href="/journal/11120" class="c-breadcrumbs__link" itemprop="item" data-track="click_breadcrumb" data-track-context="article page" data-track-category="article" data-track-action="breadcrumbs" data-track-label="breadcrumb2"><span itemprop="name">Photosynthesis Research</span></a><meta itemprop="position" content="2"> <svg class="c-breadcrumbs__chevron" role="img" aria-hidden="true" focusable="false" width="10" height="10" viewBox="0 0 10 10"> <path d="m5.96738168 4.70639573 2.39518594-2.41447274c.37913917-.38219212.98637524-.38972225 1.35419292-.01894278.37750606.38054586.37784436.99719163-.00013556 1.37821513l-4.03074001 4.06319683c-.37758093.38062133-.98937525.38100976-1.367372-.00003075l-4.03091981-4.06337806c-.37759778-.38063832-.38381821-.99150444-.01600053-1.3622839.37750607-.38054587.98772445-.38240057 1.37006824.00302197l2.39538588 2.4146743.96295325.98624457z" fill-rule="evenodd" transform="matrix(0 -1 1 0 0 10)"/> </svg> </li> <li class="c-breadcrumbs__item" id="breadcrumb2" itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem"> <span itemprop="name">Article</span><meta itemprop="position" content="3"> </li> </ol> </nav> <h1 class="c-article-title" data-test="article-title" data-article-title="">Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts</h1> <ul class="c-article-identifiers"> <li class="c-article-identifiers__item"> Published: <time datetime="2004-04">April 2004</time> </li> </ul> <ul class="c-article-identifiers c-article-identifiers--cite-list"> <li class="c-article-identifiers__item"> <span data-test="journal-volume">Volume 80</span>, pages 109–124, (<span data-test="article-publication-year">2004</span>) </li> <li class="c-article-identifiers__item c-article-identifiers__item--cite"> <a href="#citeas" data-track="click" data-track-action="cite this article" data-track-category="article body" data-track-label="link">Cite this article</a> </li> </ul> <div class="app-article-masthead__buttons" data-test="download-article-link-wrapper" data-track-context="masthead"> </div> </div> <div class="app-article-masthead__brand"> <a href="/journal/11120" class="app-article-masthead__journal-link" data-track="click_journal_home" data-track-action="journal homepage" data-track-context="article page" data-track-label="link"> <picture> <source type="image/webp" media="(min-width: 768px)" width="120" height="159" srcset="https://media.springernature.com/w120/springer-static/cover-hires/journal/11120?as=webp, https://media.springernature.com/w316/springer-static/cover-hires/journal/11120?as=webp 2x"> <img width="72" height="95" src="https://media.springernature.com/w72/springer-static/cover-hires/journal/11120?as=webp" srcset="https://media.springernature.com/w144/springer-static/cover-hires/journal/11120?as=webp 2x" alt=""> </picture> <span class="app-article-masthead__journal-title">Photosynthesis Research</span> </a> <a href="https://link.springer.com/journal/11120/aims-and-scope" class="app-article-masthead__submission-link" data-track="click_aims_and_scope" data-track-action="aims and scope" data-track-context="article page" data-track-label="link"> Aims and scope <svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-arrow-right-medium"></use></svg> </a> <a href="https://submission.nature.com/new-submission/11120/3" class="app-article-masthead__submission-link" data-track="click_submit_manuscript" data-track-context="article masthead on springerlink article page" data-track-action="submit manuscript" data-track-label="link"> Submit manuscript <svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-arrow-right-medium"></use></svg> </a> </div> </div> </div> </section> <div class="c-article-main u-container u-mt-24 u-mb-32 l-with-sidebar" id="main-content" data-component="article-container"> <main class="u-serif js-main-column" data-track-component="article body"> <div class="c-article-header"> <header> <ul class="c-article-author-list c-article-author-list--short" data-test="authors-list" data-component-authors-activator="authors-list"><li class="c-article-author-list__item"><a data-test="author-name" data-track="click" data-track-action="open author" data-track-label="link" href="#auth-Petra-Fromme-Aff1" data-author-popup="auth-Petra-Fromme-Aff1" data-author-search="Fromme, Petra">Petra Fromme</a><sup class="u-js-hide"><a href="#Aff1">1</a></sup> &amp; </li><li class="c-article-author-list__item"><a data-test="author-name" data-track="click" data-track-action="open author" data-track-label="link" href="#auth-Paul-Mathis-Aff2" data-author-popup="auth-Paul-Mathis-Aff2" data-author-search="Mathis, Paul">Paul Mathis</a><sup class="u-js-hide"><a href="#Aff2">2</a></sup> </li></ul> <div data-test="article-metrics"> <ul class="app-article-metrics-bar u-list-reset"> <li class="app-article-metrics-bar__item"> <p class="app-article-metrics-bar__count"><svg class="u-icon app-article-metrics-bar__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-accesses-medium"></use> </svg>501 <span class="app-article-metrics-bar__label">Accesses</span></p> </li> <li class="app-article-metrics-bar__item"> <p class="app-article-metrics-bar__count"><svg class="u-icon app-article-metrics-bar__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-citations-medium"></use> </svg>41 <span class="app-article-metrics-bar__label">Citations</span></p> </li> <li class="app-article-metrics-bar__item"> <p class="app-article-metrics-bar__count"><svg class="u-icon app-article-metrics-bar__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-altmetric-medium"></use> </svg>3 <span class="app-article-metrics-bar__label">Altmetric</span></p> </li> <li class="app-article-metrics-bar__item app-article-metrics-bar__item--metrics"> <p class="app-article-metrics-bar__details"><a href="/article/10.1023/B:PRES.0000030657.88242.e1/metrics" data-track="click" data-track-action="view metrics" data-track-label="link" rel="nofollow">Explore all metrics <svg class="u-icon app-article-metrics-bar__arrow-icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a></p> </li> </ul> </div> <div class="u-mt-32"> </div> </header> </div> <div data-article-body="true" data-track-component="article body" class="c-article-body"> <section aria-labelledby="Abs1" data-title="Abstract" lang="en"><div class="c-article-section" id="Abs1-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="Abs1">Abstract</h2><div class="c-article-section__content" id="Abs1-content"><p>This article describes some aspects of the history of the discovery of the structure and function of Photosystem I (PS I). PS I is the largest and most complex membrane protein for which detailed structural and functional information is now available. This short historical review cannot cover all the work that has been carried out over more than 50 years, nor provide a deep insight into the structure and function of this protein complex. Instead, this review focuses on more personal views of some of the key discoveries, starting in the 1950s with the discovery of the existence of two photoreactions in oxygenic photosynthesis, and ending with the race towards an atomic structure of PS I.</p></div></div></section> <div class="c-notes"> <p class="c-notes__text c-status-message--info"> <svg width="24" height="24" focusable="false" role="img" aria-hidden="true" class="c-status-message__icon"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-info-filled-medium"></use> </svg> This is a preview of subscription content, <a id="test-login-banner-link" href="//wayf.springernature.com?redirect_uri&#x3D;https%3A%2F%2Flink.springer.com%2Farticle%2F10.1023%2FB%3APRES.0000030657.88242.e1%3Ferror%3Dcookies_not_supported%26code%3Dc1edb4a0-c559-4894-a666-653450600278" data-track="click" data-track-action="login" data-track-label="link" class="c-preview-message__link">log in via an institution</a> <svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon c-external-link__icon"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-external-link-small"></use> </svg> to check access. </p> </div> <div data-test="access-article" class="app-article-access"> <h2 class="app-article-access__heading">Access this article</h2> <div class="u-ma-16 u-clear-both"> <a href="//wayf.springernature.com?redirect_uri&#x3D;https%3A%2F%2Flink.springer.com%2Farticle%2F10.1023%2FB%3APRES.0000030657.88242.e1%3Ferror%3Dcookies_not_supported%26code%3Dc1edb4a0-c559-4894-a666-653450600278" class="u-button u-button--full-width u-button--primary u-justify-content-space-between c-pdf-download__link" data-track="click" data-track-action="institution access" data-track-label="button"> <span data-test="access-via-institution">Log in via an institution</span> <svg aria-hidden="true" focusable="false" width="24" height="24" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg> </a> </div> <div data-test="buy-box-mobile" class="c-article-buy-box"> <div class="sprcom-buybox-articleDarwin" id="sprcom-buybox-articleDarwin"> <!-- rendered: 2024-11-24T12:42:14.684793 --><!-- Darwin version --> <div class="buying-option" data-test-id="buy-article-darwin"> <div> <div class="c-springer-plus"> <h2 class="springer-plus-heading">Subscribe and save</h2> <div class="springer-plus"> <div class="springer-plus-headline"> <div class="springer-plus-title"> <svg aria-hidden="true" focusable="false" width="16" height="16" class="u-icon"> <use xlink:href="#icon-eds-i-check-filled-medium"></use> </svg><span>Springer+ Basic</span> </div> <div class="dd price-amount-springer-plus"> €32.70 /Month </div> </div> <ul class="buying-option-usps"> <li>Get 10 units per month</li> <li>Download Article/Chapter or eBook</li> <li>1 Unit = 1 Article or 1 Chapter</li> <li>Cancel anytime</li> </ul><a href="https://link.springer.com/product/springer-plus" id="btn-subscribe-springerPlus" class="u-button u-button--full-width u-button--secondary" data-track="click||click_springer_subscribe" data-track-context="buy box"><span>Subscribe now </span> <svg aria-hidden="true" focusable="false" width="16" height="16" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a> </div> <h2 class="springer-plus-heading">Buy Now</h2> </div> <div class="buybox__buy"> <form action="https://order.springer.com/public/cart" method="post"> <input type="hidden" name="type" value="article"><input type="hidden" name="doi" value="10.1023/B:PRES.0000030657.88242.e1"><input type="hidden" name="isxn" value="1573-5079"><input type="hidden" name="contenttitle" value="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts"><input type="hidden" name="copyrightyear" value="2004"><input type="hidden" name="year" value=""><input type="hidden" name="authors" value="Petra Fromme, Paul Mathis"><input type="hidden" name="title" value="Photosynthesis Research"><input type="hidden" name="mac" value="1b6a22fbc3d55e06456b2b7deba68623"> <div class="u-ma-16"> <button type="submit" class="u-button--small u-button u-button--secondary u-button--full-width" onclick="dataLayer.push({&quot;event&quot;:&quot;addToCart&quot;,&quot;ecommerce&quot;:{&quot;currencyCode&quot;:&quot;EUR&quot;,&quot;add&quot;:{&quot;products&quot;:[{&quot;name&quot;:&quot;Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts&quot;,&quot;id&quot;:&quot;1573-5079&quot;,&quot;price&quot;:39.95,&quot;brand&quot;:&quot;Kluwer Academic Publishers&quot;,&quot;category&quot;:&quot;Plant Science&quot;,&quot;variant&quot;:&quot;ppv-article&quot;,&quot;quantity&quot;:1}]}}});"><span>Buy article PDF 39,95 €</span></button> </div> </form> <p class="c-notes__text c-notes__vat">Price includes VAT (Hong Kong/P.R.China)<br></p> <p class="c-notes__text c-notes__usp">Instant access to the full article PDF.</p> </div> </div> <script>dataLayer.push({"ecommerce":{"currency":"EUR","impressions":[{"name":"Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts","id":"1573-5079","price":39.95,"brand":"Kluwer Academic Publishers","category":"Plant Science","variant":"ppv-article","quantity":1}]}});</script> <script style="display: none"> ;(function () { if (document.cookie.indexOf("feature-monetise-subscriptions-display-springer-plus") > -1) { document.querySelectorAll(".c-springer-plus").forEach(function(node) { node.style.display = "block" }) } // springerPlus roll out 10% starts here var springerPlusGroup = setLocalStorageSpringerPlus(); var rollOutSpringerPlus = springerPlusGroup === "B" function setLocalStorageSpringerPlus() { var selectUserKey = "springerPlusRollOut"; var springerPlusGroup = "X"; if (!window.localStorage) return springerPlusGroup; try { var selectUserValue = window.localStorage.getItem(selectUserKey) springerPlusGroup = selectUserValue || randomDistributionSpringerPlus(selectUserKey) } catch (err) { console.log(err) } return springerPlusGroup; } function randomDistributionSpringerPlus(selectUserKey) { var randomGroup = Math.random() < 0.9 ? "A" : "B" window.localStorage.setItem(selectUserKey, randomGroup) return randomGroup } if (rollOutSpringerPlus) { revealSpringerPlus(); } function revealSpringerPlus() { var article = document.getElementById("sprcom-buybox-articleDarwin"); if(article) { document.querySelectorAll(".c-springer-plus").forEach(function(node) { node.style.display = "block" }) } } //springerPlus ends here })() </script> <style> .springer-plus .buying-option-usps > li::before { background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg' fill='%230070A8'%3E%3Ccircle cx='50' cy='50' r='50'/%3E%3C/svg%3E"); } </style> </div> <article class="buybox__rent-article buybox__access-option u-sans-serif" id="deepdyve" style="display: none" data-test-id="journal-subscription"> <div class="c-box__body"> <div class="buybox__info"> <p>Rent this article via <a class="deepdyve-link" target="deepdyve" rel="nofollow" data-track="click" data-track-action="rent article" data-track-label="rent action, new buybox">DeepDyve</a> <svg focusable="false" role="img" aria-hidden="true" class="u-icon" style="vertical-align: middle"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-external-link-small"></use> </svg></p> </div> </div> <script> function deepDyveResponse(data) { if (data.status === 'ok') { [].slice.call(document.querySelectorAll('.buybox__rent-article')).forEach(function (article) { article.style.display = 'flex' var link = article.querySelector('.deepdyve-link') if (link) { link.setAttribute('href', data.url) } }) } } var script = document.createElement('script') script.src = '//www.deepdyve.com/rental-link?docId=10.1023/B:PRES.0000030657.88242.e1&journal=1573-5079&fieldName=journal_doi&affiliateId=springer&format=jsonp&callback=deepDyveResponse' document.body.appendChild(script) </script> </article> <div class="buybox__access-option buybox__institutional-subs-link u-sans-serif"> <p><a href="https://www.springernature.com/gp/librarians/licensing/agc/journals">Institutional subscriptions <svg aria-hidden="true" focusable="false" width="24" height="24" class="u-icon" style="vertical-align: middle"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a></p> </div> <style>.sprcom-buybox-articleDarwin .buybox__access-option{ border-top: 1px solid #cedbe0; font-size: 1rem; padding: 16px; } .sprcom-buybox-articleDarwin .c-springer-plus{ display: none; } .sprcom-buybox-articleDarwin .springer-plus{ background-color: #EBF6FF; font-family: 'Merriweather Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; padding: 16px; } .sprcom-buybox-articleDarwin .springer-plus-headline{ display: flex; justify-content: space-between; } .sprcom-buybox-articleDarwin .springer-plus-heading{ border-bottom: 1px solid #c5e0f4; border-top: 1px solid #c5e0f4; font-family: 'Merriweather Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 1.125rem; font-weight: 700; margin: 0; padding: 16px; text-align: center; } .sprcom-buybox-articleDarwin .springer-plus-title{ align-items: center; display: flex; } .sprcom-buybox-articleDarwin .springer-plus-title span{ margin-left: 8px; } .sprcom-buybox-articleDarwin .springer-plus a{ background-color: #fff; border: 1px solid #025e8d; color: #025e8d; font-size: 16px; font-weight: 700; max-height: 44px; } .sprcom-buybox-articleDarwin .springer-plus a span{ margin-right: 8px; } .sprcom-buybox-articleDarwin .springer-plus a:hover{ background-color: #025e8d; border: 4px solid #025e8d; box-shadow: none; color: #fff; font-weight: 700; } .sprcom-buybox-articleDarwin .springer-plus a:visited{ color: #025e8d; } .sprcom-buybox-articleDarwin .springer-plus a:visited:hover{ color: #fff; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps{ color: #555; font-size: 1rem; line-height: 1.6; list-style: none; margin: 0; padding: 16px 0 24px 0; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li{ padding-left: 26px; position: relative; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li::before{ content: ''; height: 10px; left: 0; position: absolute; top: calc(0.8em - 5px); width: 10px; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li:not(:first-child){ margin-top: 4px; } </style> </div> </div> </div> <div class="u-display-none"> </div> <div data-test="cobranding-download"> </div> <section aria-labelledby="inline-recommendations" data-title="Inline Recommendations" class="c-article-recommendations" data-track-component="inline-recommendations"> <h3 class="c-article-recommendations-title" id="inline-recommendations">Similar content being viewed by others</h3> <div class="c-article-recommendations-list"> <div class="c-article-recommendations-list__item"> <article class="c-article-recommendations-card" itemscope itemtype="http://schema.org/ScholarlyArticle"> <div class="c-article-recommendations-card__img"><img src="https://media.springernature.com/w92h120/springer-static/cover-hires/book/978-94-007-5724-0?as&#x3D;webp" loading="lazy" alt=""></div> <div class="c-article-recommendations-card__main"> <h3 class="c-article-recommendations-card__heading" itemprop="name headline"> <a class="c-article-recommendations-card__link" itemprop="url" href="https://link.springer.com/10.1007/978-94-007-5724-0_5?fromPaywallRec=true" data-track="select_recommendations_1" data-track-context="inline recommendations" data-track-action="click recommendations inline - 1" data-track-label="10.1007/978-94-007-5724-0_5">Organization and Assembly of Photosystem I </a> </h3> <div class="c-article-meta-recommendations" data-test="recommendation-info"> <span class="c-article-meta-recommendations__item-type">Chapter</span> <span class="c-article-meta-recommendations__date">© 2013</span> </div> </div> </article> </div> <div class="c-article-recommendations-list__item"> <article class="c-article-recommendations-card" itemscope itemtype="http://schema.org/ScholarlyArticle"> <div class="c-article-recommendations-card__img"><img src="https://media.springernature.com/w215h120/springer-static/image/art%3A10.1007%2Fs00425-015-2462-6/MediaObjects/425_2015_2462_Fig1_HTML.gif" loading="lazy" alt=""></div> <div class="c-article-recommendations-card__main"> <h3 class="c-article-recommendations-card__heading" itemprop="name headline"> <a class="c-article-recommendations-card__link" itemprop="url" href="https://link.springer.com/10.1007/s00425-015-2462-6?fromPaywallRec=true" data-track="select_recommendations_2" data-track-context="inline recommendations" data-track-action="click recommendations inline - 2" data-track-label="10.1007/s00425-015-2462-6">The extrinsic proteins of photosystem II: update </a> </h3> <div class="c-article-meta-recommendations" data-test="recommendation-info"> <span class="c-article-meta-recommendations__item-type">Article</span> <span class="c-article-meta-recommendations__date">12 January 2016</span> </div> </div> </article> </div> <div class="c-article-recommendations-list__item"> <article class="c-article-recommendations-card" itemscope itemtype="http://schema.org/ScholarlyArticle"> <div class="c-article-recommendations-card__img"><img src="https://media.springernature.com/w215h120/springer-static/image/art%3A10.1007%2Fs11120-021-00857-9/MediaObjects/11120_2021_857_Fig1_HTML.png" loading="lazy" alt=""></div> <div class="c-article-recommendations-card__main"> <h3 class="c-article-recommendations-card__heading" itemprop="name headline"> <a class="c-article-recommendations-card__link" itemprop="url" href="https://link.springer.com/10.1007/s11120-021-00857-9?fromPaywallRec=true" data-track="select_recommendations_3" data-track-context="inline recommendations" data-track-action="click recommendations inline - 3" data-track-label="10.1007/s11120-021-00857-9">Recent advances in the structural diversity of reaction centers </a> </h3> <div class="c-article-meta-recommendations" data-test="recommendation-info"> <span class="c-article-meta-recommendations__item-type">Article</span> <span class="c-article-meta-recommendations__access-type">Open access</span> <span class="c-article-meta-recommendations__date">26 June 2021</span> </div> </div> </article> </div> </div> </section> <script> window.dataLayer = window.dataLayer || []; window.dataLayer.push({ recommendations: { recommender: 'semantic', model: 'specter', policy_id: 'NA', timestamp: 1732410502, embedded_user: 'null' } }); </script> <div id="MagazineFulltextArticleBodySuffix"><section aria-labelledby="Bib1" data-title="References"><div class="c-article-section" id="Bib1-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="Bib1">References</h2><div class="c-article-section__content" id="Bib1-content"><div data-container-section="references"><ul class="c-article-references" data-track-component="outbound reference" data-track-context="references section"><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR1">Almog O, Shoham G, Michaeli D and Nechushtai R (1991) Monomeric and trimeric forms of Photosystem I reaction center of <i>Mastigocladus laminosus</i>: crystallization and preliminary characterization. Proc Natl Acad Sci USA 88: 5312–5316</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1905020" aria-label="PubMed reference 1">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3MXks1yksrk%3D" aria-label="CAS reference 1">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 1" href="http://scholar.google.com/scholar_lookup?&amp;title=Monomeric%20and%20trimeric%20forms%20of%20Photosystem%20I%20reaction%20center%20of%20Mastigocladus%20laminosus%3A%20crystallization%20and%20preliminary%20characterization&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=88&amp;pages=5312-5316&amp;publication_year=1991&amp;author=Almog%2CO&amp;author=Shoham%2CG&amp;author=Michaeli%2CD&amp;author=Nechushtai%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR2">Andersen B (1994) Structure and Function of Photosystem I. Thesis. Department of Plant Biology, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 2" href="http://scholar.google.com/scholar_lookup?&amp;title=Structure%20and%20Function%20of%20Photosystem%20I&amp;publication_year=1994&amp;author=Andersen%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR3">Andersen B and Scheller HV (eds) (1993) Structure, Function and Assembly of Photosystem I. Academic Press</p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR4">Anderson JM and Boardman NK (1966) Fractionation of the photochemical systems of photosynthesis. I. Chlorophyll content and photochemical activities of particles isolated from spinach chloroplasts. Biochim Biophys Acta 112: 403–421</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF28XnslKmtg%3D%3D" aria-label="CAS reference 4">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 4" href="http://scholar.google.com/scholar_lookup?&amp;title=Fractionation%20of%20the%20photochemical%20systems%20of%20photosynthesis.%20I.%20Chlorophyll%20content%20and%20photochemical%20activities%20of%20particles%20isolated%20from%20spinach%20chloroplasts&amp;journal=Biochim%20Biophys%20Acta&amp;volume=112&amp;pages=403-421&amp;publication_year=1966&amp;author=Anderson%2CJM&amp;author=Boardman%2CNK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR5">Baszynski T, Brand J, Krogmann DW and Crane FL (1971) Plastocyanin participation in chloroplast Photosystem I. Biochim Biophys Acta 234: 537–540</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4399022" aria-label="PubMed reference 5">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3MXkslalur8%3D" aria-label="CAS reference 5">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 5" href="http://scholar.google.com/scholar_lookup?&amp;title=Plastocyanin%20participation%20in%20chloroplast%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=234&amp;pages=537-540&amp;publication_year=1971&amp;author=Baszynski%2CT&amp;author=Brand%2CJ&amp;author=Krogmann%2CDW&amp;author=Crane%2CFL"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR6">Beinert H, Kok B and Hoch G (1962) The light induced electron paramagnetic resonance signal of photocatalyst P700. Biochem Biophys Res Comm 7: 209–212</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=13866634" aria-label="PubMed reference 6">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF38XksFersL0%3D" aria-label="CAS reference 6">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 6" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20light%20induced%20electron%20paramagnetic%20resonance%20signal%20of%20photocatalyst%20P700&amp;journal=Biochem%20Biophys%20Res%20Comm&amp;volume=7&amp;pages=209-212&amp;publication_year=1962&amp;author=Beinert%2CH&amp;author=Kok%2CB&amp;author=Hoch%2CG"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR7">Bengis C and Nelson N (1975) Purification and properties of the Photosystem I reaction center from chloroplasts. J Biol Chem 250: 2783–2788</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=804481" aria-label="PubMed reference 7">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2MXktVGhu7g%3D" aria-label="CAS reference 7">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 7" href="http://scholar.google.com/scholar_lookup?&amp;title=Purification%20and%20properties%20of%20the%20Photosystem%20I%20reaction%20center%20from%20chloroplasts&amp;journal=J%20Biol%20Chem&amp;volume=250&amp;pages=2783-2788&amp;publication_year=1975&amp;author=Bengis%2CC&amp;author=Nelson%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR8">Bengis C and Nelson N (1977) Subunit structure of chloroplast Photosystem I reaction center. J Biol Chem 252: 4564–4569</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=17601" aria-label="PubMed reference 8">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2sXltFCrtrs%3D" aria-label="CAS reference 8">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 8" href="http://scholar.google.com/scholar_lookup?&amp;title=Subunit%20structure%20of%20chloroplast%20Photosystem%20I%20reaction%20center&amp;journal=J%20Biol%20Chem&amp;volume=252&amp;pages=4564-4569&amp;publication_year=1977&amp;author=Bengis%2CC&amp;author=Nelson%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR9">Ben-Shem A, Frolow F and Nelson N (2003) Crystal structure of plant Photosystem I. Nature 426: 630–635</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=14668855" aria-label="PubMed reference 9">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3sXps1Cks7g%3D" aria-label="CAS reference 9">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 9" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystal%20structure%20of%20plant%20Photosystem%20I&amp;journal=Nature&amp;volume=426&amp;pages=630-635&amp;publication_year=2003&amp;author=Ben-Shem%2CA&amp;author=Frolow%2CF&amp;author=Nelson%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR10">Bibby TS, Nield J, Partensky F and Barber J (2001) Iron deficiency induces the formation of an antenna ring around trimeric Photosystem I in cyanobacteria. Nature 412: 743–745</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11507643" aria-label="PubMed reference 10">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXmt1Oqt7k%3D" aria-label="CAS reference 10">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 10" href="http://scholar.google.com/scholar_lookup?&amp;title=Iron%20deficiency%20induces%20the%20formation%20of%20an%20antenna%20ring%20around%20trimeric%20Photosystem%20I%20in%20cyanobacteria&amp;journal=Nature&amp;volume=412&amp;pages=743-745&amp;publication_year=2001&amp;author=Bibby%2CTS&amp;author=Nield%2CJ&amp;author=Partensky%2CF&amp;author=Barber%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR11">Bittl R, Zech SG, Fromme P, Witt HT and Lubitz W (1997) Pulse EPR structure analysis of Photosystem I single crystals: localization of the phylloquinone acceptor. Biochemistry 36: 12001–12004</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9340008" aria-label="PubMed reference 11">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXmt1emsr8%3D" aria-label="CAS reference 11">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 11" href="http://scholar.google.com/scholar_lookup?&amp;title=Pulse%20EPR%20structure%20analysis%20of%20Photosystem%20I%20single%20crystals%3A%20localization%20of%20the%20phylloquinone%20acceptor&amp;journal=Biochemistry&amp;volume=36&amp;pages=12001-12004&amp;publication_year=1997&amp;author=Bittl%2CR&amp;author=Zech%2CSG&amp;author=Fromme%2CP&amp;author=Witt%2CHT&amp;author=Lubitz%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR12">Blankenship RE (1992) Origin and early evaluation of photosynthesis. Photosynth Res 33: 91–111</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11538390" aria-label="PubMed reference 12">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK38XmtVyrtL8%3D" aria-label="CAS reference 12">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 12" href="http://scholar.google.com/scholar_lookup?&amp;title=Origin%20and%20early%20evaluation%20of%20photosynthesis&amp;journal=Photosynth%20Res&amp;volume=33&amp;pages=91-111&amp;publication_year=1992&amp;author=Blankenship%2CRE"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR13">Boardman NK, Thorne SW and Anderson JM (1966) Fluorescence properties of particles obtained by digitonin fragmentation of spinach chloroplasts. Proc Natl Acad Sci USA 56: 586–593</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5229980" aria-label="PubMed reference 13">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF28XltV2ns7w%3D" aria-label="CAS reference 13">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 13" href="http://scholar.google.com/scholar_lookup?&amp;title=Fluorescence%20properties%20of%20particles%20obtained%20by%20digitonin%20fragmentation%20of%20spinach%20chloroplasts&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=56&amp;pages=586-593&amp;publication_year=1966&amp;author=Boardman%2CNK&amp;author=Thorne%2CSW&amp;author=Anderson%2CJM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR14">Boekema EJ, Dekker JP, van Heel M, Rögner M, Saenger W, Witt I and Witt H (1987) Evidence for a trimeric organization of the Photosystem I complex from the thermophilic cyanobacterium <i>Synechococcus</i> sp. FEBS Lett 217: 283–286</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL2sXkslCmsLk%3D" aria-label="CAS reference 14">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 14" href="http://scholar.google.com/scholar_lookup?&amp;title=Evidence%20for%20a%20trimeric%20organization%20of%20the%20Photosystem%20I%20complex%20from%20the%20thermophilic%20cyanobacterium%20Synechococcus%20sp&amp;journal=FEBS%20Lett&amp;volume=217&amp;pages=283-286&amp;publication_year=1987&amp;author=Boekema%2CEJ&amp;author=Dekker%2CJP&amp;author=van%20Heel%2CM&amp;author=R%C3%B6gner%2CM&amp;author=Saenger%2CW&amp;author=Witt%2CI&amp;author=Witt%2CH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR15">Boekema EJ, Dekker JP, Rögner M, Saenger W, Witt I, Witt H and van Heel M (1989) Refined analysis of the trimeric structure of the isolated photosystem I complex from the thermophilic cyanobacterium Synechococcus sp. Biochim Biophys Acta 974: 81–87</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1MXit1yktLo%3D" aria-label="CAS reference 15">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 15" href="http://scholar.google.com/scholar_lookup?&amp;title=Refined%20analysis%20of%20the%20trimeric%20structure%20of%20the%20isolated%20photosystem%20I%20complex%20from%20the%20thermophilic%20cyanobacterium%20Synechococcus%20sp&amp;journal=Biochim%20Biophys%20Acta&amp;volume=974&amp;pages=81-87&amp;publication_year=1989&amp;author=Boekema%2CEJ&amp;author=Dekker%2CJP&amp;author=R%C3%B6gner%2CM&amp;author=Saenger%2CW&amp;author=Witt%2CI&amp;author=Witt%2CH&amp;author=van%20Heel%2CM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR16">Boekema EJ, Wynn RM and Malkin R (1990) The structure of spinach Photosystem I studied by electron microscopy. Biochim Biophys Acta 1017: 49–56</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3cXkslGis7c%3D" aria-label="CAS reference 16">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 16" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20structure%20of%20spinach%20Photosystem%20I%20studied%20by%20electron%20microscopy&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1017&amp;pages=49-56&amp;publication_year=1990&amp;author=Boekema%2CEJ&amp;author=Wynn%2CRM&amp;author=Malkin%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR17">Boekema EJ, Hifney A, Yakushevska AE, Piotrowski M, Keegstra W, Berry S, Michel K-P, Pistorius EK and Kruip J (2001) A giant chlorophyll-protein complex induced by iron deficiency in cyanobacteria. Nature 412: 745–748</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11507644" aria-label="PubMed reference 17">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXmt1Oqt7c%3D" aria-label="CAS reference 17">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 17" href="http://scholar.google.com/scholar_lookup?&amp;title=A%20giant%20chlorophyll-protein%20complex%20induced%20by%20iron%20deficiency%20in%20cyanobacteria&amp;journal=Nature&amp;volume=412&amp;pages=745-748&amp;publication_year=2001&amp;author=Boekema%2CEJ&amp;author=Hifney%2CA&amp;author=Yakushevska%2CAE&amp;author=Piotrowski%2CM&amp;author=Keegstra%2CW&amp;author=Berry%2CS&amp;author=Michel%2CK-P&amp;author=Pistorius%2CEK&amp;author=Kruip%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR18">Bohme H and Kunert KJ (1980) Photoreactions of cytochromes in algal chloroplasts. Eur J Biochem 106: 329–336</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="10.1111/j.1432-1033.1980.tb06027.x" data-track-item_id="10.1111/j.1432-1033.1980.tb06027.x" data-track-value="article reference" data-track-action="article reference" href="https://doi.org/10.1111%2Fj.1432-1033.1980.tb06027.x" aria-label="Article reference 18" data-doi="10.1111/j.1432-1033.1980.tb06027.x">Article</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=7341231" aria-label="PubMed reference 18">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:STN:280:DyaL387os1KntA%3D%3D" aria-label="CAS reference 18">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 18" href="http://scholar.google.com/scholar_lookup?&amp;title=Photoreactions%20of%20cytochromes%20in%20algal%20chloroplasts&amp;journal=Eur%20J%20Biochem&amp;doi=10.1111%2Fj.1432-1033.1980.tb06027.x&amp;volume=106&amp;pages=329-336&amp;publication_year=1980&amp;author=Bohme%2CH&amp;author=Kunert%2CKJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR19">Bonnerjea J and Evans MCW (1982) Identification of multiple components in the intermediary electron carrier complex of Photosystem I. FEBS Lett 148: 313–316</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3sXhsVCkug%3D%3D" aria-label="CAS reference 19">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 19" href="http://scholar.google.com/scholar_lookup?&amp;title=Identification%20of%20multiple%20components%20in%20the%20intermediary%20electron%20carrier%20complex%20of%20Photosystem%20I&amp;journal=FEBS%20Lett&amp;volume=148&amp;pages=313-316&amp;publication_year=1982&amp;author=Bonnerjea%2CJ&amp;author=Evans%2CMCW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR20">Böttcher B, Gräber P and Boekema EJ (1992) The structure of Photosystem I from the thermophilic cyanobacterium <i>Synechococcus</i> sp. determined by electron microscopy of two-dimensional crystals. Biochim Biophys Acta 1100: 125–136</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1610871" aria-label="PubMed reference 20">PubMed</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 20" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20structure%20of%20Photosystem%20I%20from%20the%20thermophilic%20cyanobacterium%20Synechococcus%20sp&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1100&amp;pages=125-136&amp;publication_year=1992&amp;author=B%C3%B6ttcher%2CB&amp;author=Gr%C3%A4ber%2CP&amp;author=Boekema%2CEJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR21">Bottin H and Lagoutte B (1992) Ferredoxin and flavodoxin from the cyanobacterium <i>Synechocystis</i> sp. PCC 6803. Biochim Biophys Acta 1101: 48–56</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1633177" aria-label="PubMed reference 21">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXit1yntbk%3D" aria-label="CAS reference 21">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 21" href="http://scholar.google.com/scholar_lookup?&amp;title=Ferredoxin%20and%20flavodoxin%20from%20the%20cyanobacterium%20Synechocystis%20sp.%20PCC%206803&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1101&amp;pages=48-56&amp;publication_year=1992&amp;author=Bottin%2CH&amp;author=Lagoutte%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR22">Breton J, Roux E and Whitmarsh J (1975) Dichroism of chlorophyll <i>a</i> <sub>I</sub> absorption change at 700 nm using chloroplasts oriented in a magnetic field. Biochem Biophys Res Comm 64: 1274–1277</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2MXltFWgsr8%3D" aria-label="CAS reference 22">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 22" href="http://scholar.google.com/scholar_lookup?&amp;title=Dichroism%20of%20chlorophyll%20a%20I%20absorption%20change%20at%20700%20nm%20using%20chloroplasts%20oriented%20in%20a%20magnetic%20field&amp;journal=Biochem%20Biophys%20Res%20Comm&amp;volume=64&amp;pages=1274-1277&amp;publication_year=1975&amp;author=Breton%2CJ&amp;author=Roux%2CE&amp;author=Whitmarsh%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR23">Breton J, Nabedryk E and Leibl W(1999) FTIR study of the primary electron donor of Photosystem I (P700) revealing delocalization of the charge in P700<sup>+</sup> and localization of the triplet character in <sup>3</sup>P700. Biochemistry 38: 11585–11592</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=10512612" aria-label="PubMed reference 23">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1MXlt1ans78%3D" aria-label="CAS reference 23">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 23" href="http://scholar.google.com/scholar_lookup?&amp;title=FTIR%20study%20of%20the%20primary%20electron%20donor%20of%20Photosystem%20I%20%28P700%29%20revealing%20delocalization%20of%20the%20charge%20in%20P700%2B%20and%20localization%20of%20the%20triplet%20character%20in%203P700&amp;journal=Biochemistry&amp;volume=38&amp;pages=11585-11592&amp;publication_year=1999&amp;author=Breton%2CJ&amp;author=Nabedryk%2CE&amp;author=Leibl%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR24">Brettel K (1997) Electron transfer and arrangement of the redox cofactors in Photosystem I. Biochim Biophys Acta 1318: 322–373</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXmsVWisA%3D%3D" aria-label="CAS reference 24">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 24" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20and%20arrangement%20of%20the%20redox%20cofactors%20in%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1318&amp;pages=322-373&amp;publication_year=1997&amp;author=Brettel%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR25">Brettel K and Golbeck JH (1995) Spectral and kinetic characterization of electron acceptor A1 in a Photosystem I core devoid of iron-sulfur centers FX, FB and FA. Photosyn Res 45: 183–193</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK28Xnt1Krtg%3D%3D" aria-label="CAS reference 25">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 25" href="http://scholar.google.com/scholar_lookup?&amp;title=Spectral%20and%20kinetic%20characterization%20of%20electron%20acceptor%20A1%20in%20a%20Photosystem%20I%20core%20devoid%20of%20iron-sulfur%20centers%20FX%2C%20FB%20and%20FA&amp;journal=Photosyn%20Res&amp;volume=45&amp;pages=183-193&amp;publication_year=1995&amp;author=Brettel%2CK&amp;author=Golbeck%2CJH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR26">Brettel K and Leibl W (2001) Electron transfer in Photosystem I. Biochim Biophys Acta 1507: 100–114</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11687210" aria-label="PubMed reference 26">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXnvFCktbY%3D" aria-label="CAS reference 26">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 26" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20in%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1507&amp;pages=100-114&amp;publication_year=2001&amp;author=Brettel%2CK&amp;author=Leibl%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR27">Cederstrand CN and Govindjee (1966) Some properties of spinach chloroplast fractions obtained by digitonin solubilization. Biochim Biophys Acta 120: 177–180</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5961103" aria-label="PubMed reference 27">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF28Xkt1artr0%3D" aria-label="CAS reference 27">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 27" href="http://scholar.google.com/scholar_lookup?&amp;title=Some%20properties%20of%20spinach%20chloroplast%20fractions%20obtained%20by%20digitonin%20solubilization&amp;journal=Biochim%20Biophys%20Acta&amp;volume=120&amp;pages=177-180&amp;publication_year=1966&amp;author=Cederstrand%2CCN&amp;author=Govindjee%2C"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR28">Chitnis PR (1996) Photosystem I. Plant Physiol 111: 661–669</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8754676" aria-label="PubMed reference 28">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK28XktlKksr8%3D" aria-label="CAS reference 28">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 28" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I&amp;journal=Plant%20Physiol&amp;volume=111&amp;pages=661-669&amp;publication_year=1996&amp;author=Chitnis%2CPR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR29">Commoner B (1961) Electron spin resonance studies of photosynthetic systems. In: Mc Elroy WD and Glass B (eds) Light and Life, pp 356–377. The John Hopkins Press, Baltimore, Maryland</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 29" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20spin%20resonance%20studies%20of%20photosynthetic%20systems&amp;pages=356-377&amp;publication_year=1961&amp;author=Commoner%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR30">Commoner B, Heise JJ and Townsend J (1956) Light-induced paramagnetism in chloroplasts. Proc Natl Acad Sci USA 42: 710–718</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16589937" aria-label="PubMed reference 30">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaG2sXisF2lsw%3D%3D" aria-label="CAS reference 30">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 30" href="http://scholar.google.com/scholar_lookup?&amp;title=Light-induced%20paramagnetism%20in%20chloroplasts&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=42&amp;pages=710-718&amp;publication_year=1956&amp;author=Commoner%2CB&amp;author=Heise%2CJJ&amp;author=Townsend%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR31">Deligiannakis Y, Hanley J and Rutherford AW (1997) Spin-lattice relaxation of the phylloquinone radical of Photosystem I. Biochemistry 37: 3329–3336</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 31" href="http://scholar.google.com/scholar_lookup?&amp;title=Spin-lattice%20relaxation%20of%20the%20phylloquinone%20radical%20of%20Photosystem%20I&amp;journal=Biochemistry&amp;volume=37&amp;pages=3329-3336&amp;publication_year=1997&amp;author=Deligiannakis%2CY&amp;author=Hanley%2CJ&amp;author=Rutherford%2CAW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR32">Diaz-Quintana A, Leibl W, Bottin H and Sétif P (1998) Electron transfer in Photosystem I. Reaction centers follow a linear pathway in which iron-sulfur cluster FB is the immediate electron donor to soluble ferredoxin. Biochemistry 37: 3429–3439</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9521664" aria-label="PubMed reference 32">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1cXhtFaqu78%3D" aria-label="CAS reference 32">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 32" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20in%20Photosystem%20I.%20Reaction%20centers%20follow%20a%20linear%20pathway%20in%20which%20iron-sulfur%20cluster%20FB%20is%20the%20immediate%20electron%20donor%20to%20soluble%20ferredoxin&amp;journal=Biochemistry&amp;volume=37&amp;pages=3429-3439&amp;publication_year=1998&amp;author=Diaz-Quintana%2CA&amp;author=Leibl%2CW&amp;author=Bottin%2CH&amp;author=S%C3%A9tif%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR33">Dietrich WE and Thornber JP (1971) The P700-chlorophyll aprotein of a blue-green alga. Biochim Biophys Acta 245: 482–493</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5003701" aria-label="PubMed reference 33">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3MXltlOlt7k%3D" aria-label="CAS reference 33">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 33" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20P700-chlorophyll%20aprotein%20of%20a%20blue-green%20alga&amp;journal=Biochim%20Biophys%20Acta&amp;volume=245&amp;pages=482-493&amp;publication_year=1971&amp;author=Dietrich%2CWE&amp;author=Thornber%2CJP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR34">Döring G, Bailey JL, Weikara J and Witt HT (1968) Some new results in photosynthesis, the action of two chlorophyll aI molecules in light reaction I of photosynthesis. Naturwissenschaften 5: 219–224</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 34" href="http://scholar.google.com/scholar_lookup?&amp;title=Some%20new%20results%20in%20photosynthesis%2C%20the%20action%20of%20two%20chlorophyll%20aI%20molecules%20in%20light%20reaction%20I%20of%20photosynthesis&amp;journal=Naturwissenschaften&amp;volume=5&amp;pages=219-224&amp;publication_year=1968&amp;author=D%C3%B6ring%2CG&amp;author=Bailey%2CJL&amp;author=Weikara%2CJ&amp;author=Witt%2CHT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR35">Duysens LNM (1960) Cytochrome oxidation by a second photochemical system in the red alga <i>Porphyridium cruentum</i>. In: Christensen BC and Buchanan B (eds) Progress in Photobiology. Proceedings of the 3rd International Congress on Photobiology, Copenhagen 1960, pp 135–142. Elsevier, Amsterdam</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 35" href="http://scholar.google.com/scholar_lookup?&amp;title=Cytochrome%20oxidation%20by%20a%20second%20photochemical%20system%20in%20the%20red%20alga%20Porphyridium%20cruentum&amp;pages=135-142&amp;publication_year=1960&amp;author=Duysens%2CLNM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR36">Duysens LNM (1989) The discovery of the two photosynthetic systems: a personal account. Photosynth Res 21: 61–79</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1MXlsFakt7c%3D" aria-label="CAS reference 36">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 36" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20discovery%20of%20the%20two%20photosynthetic%20systems%3A%20a%20personal%20account&amp;journal=Photosynth%20Res&amp;volume=21&amp;pages=61-79&amp;publication_year=1989&amp;author=Duysens%2CLNM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR37">Duysens LNM, Amesz J and Kamp BM (1961) Two photochemical systems in photosynthesis. Nature 190: 510–511</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=13725322" aria-label="PubMed reference 37">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF3MXhtFalurc%3D" aria-label="CAS reference 37">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 37" href="http://scholar.google.com/scholar_lookup?&amp;title=Two%20photochemical%20systems%20in%20photosynthesis&amp;journal=Nature&amp;volume=190&amp;pages=510-511&amp;publication_year=1961&amp;author=Duysens%2CLNM&amp;author=Amesz%2CJ&amp;author=Kamp%2CBM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR38">Dzuba SA, Gast P and Hoff AJ (1997) Electron spin echo of spin polarized radical pairs in the intact quinone reconstituted plant Photosystem I reaction center. Chem Phys Lett 236: 595–602</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 38" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20spin%20echo%20of%20spin%20polarized%20radical%20pairs%20in%20the%20intact%20quinone%20reconstituted%20plant%20Photosystem%20I%20reaction%20center&amp;journal=Chem%20Phys%20Lett&amp;volume=236&amp;pages=595-602&amp;publication_year=1997&amp;author=Dzuba%2CSA&amp;author=Gast%2CP&amp;author=Hoff%2CAJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR39">Evans MCW, Reeves SG and Cammack R (1974) Determination of the oxidation-reduction potential of the bound iron-sulphur proteins of the primary electron acceptor complex of Photosystem I in spinach chloroplasts. FEBS Lett 49: 111–114</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4374381" aria-label="PubMed reference 39">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2MXntVelug%3D%3D" aria-label="CAS reference 39">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 39" href="http://scholar.google.com/scholar_lookup?&amp;title=Determination%20of%20the%20oxidation-reduction%20potential%20of%20the%20bound%20iron-sulphur%20proteins%20of%20the%20primary%20electron%20acceptor%20complex%20of%20Photosystem%20I%20in%20spinach%20chloroplasts&amp;journal=FEBS%20Lett&amp;volume=49&amp;pages=111-114&amp;publication_year=1974&amp;author=Evans%2CMCW&amp;author=Reeves%2CSG&amp;author=Cammack%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR40">Evans MCW, Sihra CK, Bolton JR and Cammack R (1975) Primary electron acceptor complex of Photosystem I in spinach chloroplasts.Nature 256: 668–670</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2MXlslGls70%3D" aria-label="CAS reference 40">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 40" href="http://scholar.google.com/scholar_lookup?&amp;title=Primary%20electron%20acceptor%20complex%20of%20Photosystem%20I%20in%20spinach%20chloroplasts&amp;journal=Nature&amp;volume=256&amp;pages=668-670&amp;publication_year=1975&amp;author=Evans%2CMCW&amp;author=Sihra%2CCK&amp;author=Bolton%2CJR&amp;author=Cammack%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR41">Farah J, Rappaport F, Choquet Y, Joliot P and Rochaix JD (1995) Isolation of a psaF-deficient mutant of <i>Chlamydomonas reinhardtii</i>: efficient interaction of plastocyanin with the Photosystem I reaction center is mediated by the PsaF subunit. EMBO J 14: 4976–4984</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=7588626" aria-label="PubMed reference 41">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2MXptFyju7w%3D" aria-label="CAS reference 41">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 41" href="http://scholar.google.com/scholar_lookup?&amp;title=Isolation%20of%20a%20psaF-deficient%20mutant%20of%20Chlamydomonas%20reinhardtii%3A%20efficient%20interaction%20of%20plastocyanin%20with%20the%20Photosystem%20I%20reaction%20center%20is%20mediated%20by%20the%20PsaF%20subunit&amp;journal=EMBO%20J&amp;volume=14&amp;pages=4976-4984&amp;publication_year=1995&amp;author=Farah%2CJ&amp;author=Rappaport%2CF&amp;author=Choquet%2CY&amp;author=Joliot%2CP&amp;author=Rochaix%2CJD"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR42">Fish L, Kuck U and Bogorad L (1985) Two partially homologous adjacent light-inducible maize chloroplast genes encoding polypeptides of the P700 chlorophyll a protein complex of Photosystem I. J Biol Chem 260: 1413–1421</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=3881431" aria-label="PubMed reference 42">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL2MXht1Knsbs%3D" aria-label="CAS reference 42">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 42" href="http://scholar.google.com/scholar_lookup?&amp;title=Two%20partially%20homologous%20adjacent%20light-inducible%20maize%20chloroplast%20genes%20encoding%20polypeptides%20of%20the%20P700%20chlorophyll%20a%20protein%20complex%20of%20Photosystem%20I&amp;journal=J%20Biol%20Chem&amp;volume=260&amp;pages=1413-1421&amp;publication_year=1985&amp;author=Fish%2CL&amp;author=Kuck%2CU&amp;author=Bogorad%2CL"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR43">Ford RC (1987) Investigation of highly stable Photosystem I chlorophyll-protein complexes from the thermophilic cyanobacterium <i>Phormidium laminosum</i>. Biochim Biophys Acta 893: 115–125</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL2sXlslaksL4%3D" aria-label="CAS reference 43">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 43" href="http://scholar.google.com/scholar_lookup?&amp;title=Investigation%20of%20highly%20stable%20Photosystem%20I%20chlorophyll-protein%20complexes%20from%20the%20thermophilic%20cyanobacterium%20Phormidium%20laminosum&amp;journal=Biochim%20Biophys%20Acta&amp;volume=893&amp;pages=115-125&amp;publication_year=1987&amp;author=Ford%2CRC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR44">Ford RC and Holzenburg A (1988) Investigation of the structure of trimeric and monomeric Photosytem I reaction centre complexes.EMBO J 7: 2287–2293</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16453855" aria-label="PubMed reference 44">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1cXls1OntLo%3D" aria-label="CAS reference 44">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 44" href="http://scholar.google.com/scholar_lookup?&amp;title=Investigation%20of%20the%20structure%20of%20trimeric%20and%20monomeric%20Photosytem%20I%20reaction%20centre%20complexes&amp;journal=EMBO%20J&amp;volume=7&amp;pages=2287-2293&amp;publication_year=1988&amp;author=Ford%2CRC&amp;author=Holzenburg%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR45">Ford R, Paupit R and Holzenburg A (1988) Structural studies on improved crystals of the Photosystem I reaction centre from <i>Phormidium laminosum</i>. FEBS Lett 238: 385–389</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1MXkvVOg" aria-label="CAS reference 45">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 45" href="http://scholar.google.com/scholar_lookup?&amp;title=Structural%20studies%20on%20improved%20crystals%20of%20the%20Photosystem%20I%20reaction%20centre%20from%20Phormidium%20laminosum&amp;journal=FEBS%20Lett&amp;volume=238&amp;pages=385-389&amp;publication_year=1988&amp;author=Ford%2CR&amp;author=Paupit%2CR&amp;author=Holzenburg%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR46">Ford RC, Hefti A and Engel A (1990) Ordered arrays of the Photosystem I reaction centre after reconstitution: projections and surface reliefs of the complex at 2 nm resolution. EMBO J 9: 3067–3075</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=2120036" aria-label="PubMed reference 46">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3cXmtVymsb8%3D" aria-label="CAS reference 46">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 46" href="http://scholar.google.com/scholar_lookup?&amp;title=Ordered%20arrays%20of%20the%20Photosystem%20I%20reaction%20centre%20after%20reconstitution%3A%20projections%20and%20surface%20reliefs%20of%20the%20complex%20at%202%20nm%20resolution&amp;journal=EMBO%20J&amp;volume=9&amp;pages=3067-3075&amp;publication_year=1990&amp;author=Ford%2CRC&amp;author=Hefti%2CA&amp;author=Engel%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR47">Fotiadis D, Muller DJ, Tsiotis G, Hasler L, Tittmann P, Mini T, Jeno P, Gross H and Engel A (1998) Surface analysis of the Photosystem I complex by electron and atomic force microscopy. J Mol Biol 283: 83–94</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9761675" aria-label="PubMed reference 47">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1cXmvVOkuro%3D" aria-label="CAS reference 47">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 47" href="http://scholar.google.com/scholar_lookup?&amp;title=Surface%20analysis%20of%20the%20Photosystem%20I%20complex%20by%20electron%20and%20atomic%20force%20microscopy&amp;journal=J%20Mol%20Biol&amp;volume=283&amp;pages=83-94&amp;publication_year=1998&amp;author=Fotiadis%2CD&amp;author=Muller%2CDJ&amp;author=Tsiotis%2CG&amp;author=Hasler%2CL&amp;author=Tittmann%2CP&amp;author=Mini%2CT&amp;author=Jeno%2CP&amp;author=Gross%2CH&amp;author=Engel%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR48">Frank K, McLean MB and Sauer K (1979) Triplet states in Photosystem I of spinach chloroplasts and subchloroplast particles. Proc Natl Acad Sci USA 76: 5124–5128</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=228280" aria-label="PubMed reference 48">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3cXjtleq" aria-label="CAS reference 48">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 48" href="http://scholar.google.com/scholar_lookup?&amp;title=Triplet%20states%20in%20Photosystem%20I%20of%20spinach%20chloroplasts%20and%20subchloroplast%20particles&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=76&amp;pages=5124-5128&amp;publication_year=1979&amp;author=Frank%2CK&amp;author=McLean%2CMB&amp;author=Sauer%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR49">Fromme P (1998) Crystallization of Photosystem I for structural analysis. Habilitation. Technical University Berlin, Berlin</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 49" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystallization%20of%20Photosystem%20I%20for%20structural%20analysis&amp;publication_year=1998&amp;author=Fromme%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR50">Fromme P (2003) Crystallization of Photosystem I. In: Iwata S (ed) Methods and Results in Crystallization of Membrane Proteins.pp 147–173. International University Line, La Jolla, California</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 50" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystallization%20of%20Photosystem%20I&amp;pages=147-173&amp;publication_year=2003&amp;author=Fromme%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR51">Fromme P, Jordan P and Krauß N (2001) Structure of Photosystem I. Biochim Biophys Acta 1507: 5–31</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11687205" aria-label="PubMed reference 51">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXnvFCktb0%3D" aria-label="CAS reference 51">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 51" href="http://scholar.google.com/scholar_lookup?&amp;title=Structure%20of%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1507&amp;pages=5-31&amp;publication_year=2001&amp;author=Fromme%2CP&amp;author=Jordan%2CP&amp;author=Krau%C3%9F%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR52">Fromme P, Bottin H, Krauß N and Sétif P (2002) Crystallization and electron paramagnetic resonance characterization of the complex of Photosystem I with its natural electron acceptor ferredoxin. Biophys J 83: 1760–1773</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12324399" aria-label="PubMed reference 52">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38XnslSrs74%3D" aria-label="CAS reference 52">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 52" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystallization%20and%20electron%20paramagnetic%20resonance%20characterization%20of%20the%20complex%20of%20Photosystem%20I%20with%20its%20natural%20electron%20acceptor%20ferredoxin&amp;journal=Biophys%20J&amp;volume=83&amp;pages=1760-1773&amp;publication_year=2002&amp;author=Fromme%2CP&amp;author=Bottin%2CH&amp;author=Krau%C3%9F%2CN&amp;author=S%C3%A9tif%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR53">Fujita I, Davis MS and Fajer J (1978) Anion radicals of pheophytin and chlorophyll <i>a</i>: their role in the primary charge separations of plant photosynthesis. J Am Chem Soc 100: 6280–6282</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE1cXlslKmt7c%3D" aria-label="CAS reference 53">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 53" href="http://scholar.google.com/scholar_lookup?&amp;title=Anion%20radicals%20of%20pheophytin%20and%20chlorophyll%20a%3A%20their%20role%20in%20the%20primary%20charge%20separations%20of%20plant%20photosynthesis&amp;journal=J%20Am%20Chem%20Soc&amp;volume=100&amp;pages=6280-6282&amp;publication_year=1978&amp;author=Fujita%2CI&amp;author=Davis%2CMS&amp;author=Fajer%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR54">Gast P, Swarthoff T, Ebskamp FCR and Hoff AJ (1983) Evidence for a new early acceptor in Photosystem I of plants. An ESR investigation of reaction center triplet yield and of the reduced intermediary acceptors. Biochim Biophys Acta 722: 163–175</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3sXltVKlug%3D%3D" aria-label="CAS reference 54">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 54" href="http://scholar.google.com/scholar_lookup?&amp;title=Evidence%20for%20a%20new%20early%20acceptor%20in%20Photosystem%20I%20of%20plants.%20An%20ESR%20investigation%20of%20reaction%20center%20triplet%20yield%20and%20of%20the%20reduced%20intermediary%20acceptors&amp;journal=Biochim%20Biophys%20Acta&amp;volume=722&amp;pages=163-175&amp;publication_year=1983&amp;author=Gast%2CP&amp;author=Swarthoff%2CT&amp;author=Ebskamp%2CFCR&amp;author=Hoff%2CAJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR55">Germano M, Yakushevska AE, Keegstra W, van Gorkom HJ, Dekker JP and Boekema EJ (2002) Supramolecular organization of Photosystem I and light-harvesting complex I in <i>Chlamydomonas reinhardtii</i>. FEBS Lett 525: 121–125</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12163173" aria-label="PubMed reference 55">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38XmtVamsbk%3D" aria-label="CAS reference 55">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 55" href="http://scholar.google.com/scholar_lookup?&amp;title=Supramolecular%20organization%20of%20Photosystem%20I%20and%20light-harvesting%20complex%20I%20in%20Chlamydomonas%20reinhardtii&amp;journal=FEBS%20Lett&amp;volume=525&amp;pages=121-125&amp;publication_year=2002&amp;author=Germano%2CM&amp;author=Yakushevska%2CAE&amp;author=Keegstra%2CW&amp;author=van%20Gorkom%2CHJ&amp;author=Dekker%2CJP&amp;author=Boekema%2CEJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR56">Gobets B and van Grondelle R (2001) Energy transfer and trapping in Photosystem I. Biochim Biophys Acta 1507: 80–99</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11687209" aria-label="PubMed reference 56">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXnvFCktbk%3D" aria-label="CAS reference 56">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 56" href="http://scholar.google.com/scholar_lookup?&amp;title=Energy%20transfer%20and%20trapping%20in%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1507&amp;pages=80-99&amp;publication_year=2001&amp;author=Gobets%2CB&amp;author=van%20Grondelle%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR57">Golbeck JH (1996) Photosystem I. Plant Physiol 111: 661–669</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 57" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I&amp;journal=Plant%20Physiol&amp;volume=111&amp;pages=661-669&amp;publication_year=1996&amp;author=Golbeck%2CJH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR58">Golbeck JH and Bryant DA (1991) Photosystem I. Curr Top Bioenerg 16: 83–177</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3MXmt1yht74%3D" aria-label="CAS reference 58">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 58" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I&amp;journal=Curr%20Top%20Bioenerg&amp;volume=16&amp;pages=83-177&amp;publication_year=1991&amp;author=Golbeck%2CJH&amp;author=Bryant%2CDA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR59">Golbeck JH and Cornelius JM (1986) Photosystem I charge separation in the absence of centers A and B. I. Optical characterization of center ‘A<sub>2</sub>’ and evidence for its association with a 64-kDa peptide. Biochim Biophys Acta 849: 16–24</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL28Xhs1Glsbs%3D" aria-label="CAS reference 59">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 59" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20charge%20separation%20in%20the%20absence%20of%20centers%20A%20and%20B.%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=849&amp;pages=16-24&amp;publication_year=1986&amp;author=Golbeck%2CJH&amp;author=Cornelius%2CJM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR60">Guergova-Kuras M, Boudreaux B, Joliot A, Joliot P and Redding K (2001) Evidence for two active branches for electron transfer in Photosystem I. Proc Natl Acad Sci USA 98: 4437–4442</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11274371" aria-label="PubMed reference 60">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXjtVagtrk%3D" aria-label="CAS reference 60">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 60" href="http://scholar.google.com/scholar_lookup?&amp;title=Evidence%20for%20two%20active%20branches%20for%20electron%20transfer%20in%20Photosystem%20I&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=98&amp;pages=4437-4442&amp;publication_year=2001&amp;author=Guergova-Kuras%2CM&amp;author=Boudreaux%2CB&amp;author=Joliot%2CA&amp;author=Joliot%2CP&amp;author=Redding%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR61">Hastings G and Sivakumar V (2001) A Fourier transform infrared absorption difference spectrum associated with the reduction of A1 in Photosystem I: are both phylloquinones involved in electron transfer? Biochemistry 40: 3681–3689</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11297436" aria-label="PubMed reference 61">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXhtlejurk%3D" aria-label="CAS reference 61">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 61" href="http://scholar.google.com/scholar_lookup?&amp;title=A%20Fourier%20transform%20infrared%20absorption%20difference%20spectrum%20associated%20with%20the%20reduction%20of%20A1%20in%20Photosystem%20I%3A%20are%20both%20phylloquinones%20involved%20in%20electron%20transfer%3F&amp;journal=Biochemistry&amp;volume=40&amp;pages=3681-3689&amp;publication_year=2001&amp;author=Hastings%2CG&amp;author=Sivakumar%2CV"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR62">Hatanaka H, Sonoike K, Hirano M and Katoh S (1992) Electron transfer from cytochrome <i>c</i>553 to P700 in cyanobacterial reaction center complexes with and without bound PsaF gene product. In: Murata N (ed) Research in Photosynthesis, Vol I, pp 601–604. Kluwer Academic Publishers, Dordrecht, The Netherlands</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 62" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20from%20cytochrome%20c553%20to%20P700%20in%20cyanobacterial%20reaction%20center%20complexes%20with%20and%20without%20bound%20PsaF%20gene%20product&amp;pages=601-604&amp;publication_year=1992&amp;author=Hatanaka%2CH&amp;author=Sonoike%2CK&amp;author=Hirano%2CM&amp;author=Katoh%2CS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR63">Hatanaka H, Sonoike K, Hirano M and Katoh S (1993) Small subunits of Photosystem I reaction center complexes from <i>Synechococcus elongatus</i>. I. Is the psaF gene product required for oxidation of cytochrome <i>c</i>-553? Biochim Biophys Acta 1141: 45–51</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8382079" aria-label="PubMed reference 63">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXhsVelur0%3D" aria-label="CAS reference 63">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 63" href="http://scholar.google.com/scholar_lookup?&amp;title=Small%20subunits%20of%20Photosystem%20I%20reaction%20center%20complexes%20from%20Synechococcus%20elongatus.%20I.%20Is%20the%20psaF%20gene%20product%20required%20for%20oxidation%20of%20cytochrome%20c-553%3F&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1141&amp;pages=45-51&amp;publication_year=1993&amp;author=Hatanaka%2CH&amp;author=Sonoike%2CK&amp;author=Hirano%2CM&amp;author=Katoh%2CS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR64">Hayashida N, Matsubayashi T, Shinozaki K, Sugiura M, Inoue K and Hiyama T (1987) The gene for the 9 kD polypeptide, a possible apoprotein for the iron-sulfur centers A and B of the Photosystem I complex, in tobacco chloroplast DNA. Curr Genet 12: 247–250</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=3329576" aria-label="PubMed reference 64">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1cXjt1yntg%3D%3D" aria-label="CAS reference 64">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 64" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20gene%20for%20the%209%20kD%20polypeptide%2C%20a%20possible%20apoprotein%20for%20the%20iron-sulfur%20centers%20A%20and%20B%20of%20the%20Photosystem%20I%20complex%2C%20in%20tobacco%20chloroplast%20DNA&amp;journal=Curr%20Genet&amp;volume=12&amp;pages=247-250&amp;publication_year=1987&amp;author=Hayashida%2CN&amp;author=Matsubayashi%2CT&amp;author=Shinozaki%2CK&amp;author=Sugiura%2CM&amp;author=Inoue%2CK&amp;author=Hiyama%2CT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR65">Heathcote P, Rigby SEJ and Evans MC (1995) Electron nuclear double resonance (ENDOR) studies of the phylloquinone electron acceptor (A1) in the Photosystem I reaction centre. In: Mathis P (ed) Photosynthesis: from Light to Biosphere, Vol II, pp 163–166. Kluwer Academic Publishers, Dordrecht, The Netherlands</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 65" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20nuclear%20double%20resonance%20%28ENDOR%29%20studies%20of%20the%20phylloquinone%20electron%20acceptor%20%28A1%29%20in%20the%20Photosystem%20I%20reaction%20centre&amp;pages=163-166&amp;publication_year=1995&amp;author=Heathcote%2CP&amp;author=Rigby%2CSEJ&amp;author=Evans%2CMC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR66">Heathcote P, Moenne-Loccoz P, Rigby SE and Evan MC (1996) Photoaccumulation in Photosystem I does produce a phylloquinone (A1.-) radical. Biochemistry 35: 6644–6650</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8639613" aria-label="PubMed reference 66">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK28XivVSltL0%3D" aria-label="CAS reference 66">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 66" href="http://scholar.google.com/scholar_lookup?&amp;title=Photoaccumulation%20in%20Photosystem%20I%20does%20produce%20a%20phylloquinone%20%28A1.-%29%20radical&amp;journal=Biochemistry&amp;volume=35&amp;pages=6644-6650&amp;publication_year=1996&amp;author=Heathcote%2CP&amp;author=Moenne-Loccoz%2CP&amp;author=Rigby%2CSE&amp;author=Evan%2CMC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR67">Hecks B, Wulf K, Breton J, Leibl Wand Trissl H-W (1994) Primary charge separation in Photosystem I: a two-step electrogenic charge separation connected with P700<sup>+</sup>A<sub>0</sub> <sup>-</sup> and P700<sup>+</sup>A<sub>1</sub> <sup>-</sup> formation. Biochemistry 33: 8619–8625</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8038150" aria-label="PubMed reference 67">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2cXkslymuro%3D" aria-label="CAS reference 67">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 67" href="http://scholar.google.com/scholar_lookup?&amp;title=Primary%20charge%20separation%20in%20Photosystem%20I%3A%20a%20two-step%20electrogenic%20charge%20separation%20connected%20with%20P700%2BA0%20-%20and%20P700%2BA1%20-%20formation&amp;journal=Biochemistry&amp;volume=33&amp;pages=8619-8625&amp;publication_year=1994&amp;author=Hecks%2CB&amp;author=Wulf%2CK&amp;author=Breton%2CJ&amp;author=Leibl%2CW.&amp;author=Trissl%2CH-W"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR68">Hefti A, Ford RC, Miller M, Cox RP and Engel A (1992) Analysis of the structure of Photosystem I in cyanobacterial thylakoid membranes. FEBS Lett 296: 29–32</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1730288" aria-label="PubMed reference 68">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK38XhtVars7k%3D" aria-label="CAS reference 68">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 68" href="http://scholar.google.com/scholar_lookup?&amp;title=Analysis%20of%20the%20structure%20of%20Photosystem%20I%20in%20cyanobacterial%20thylakoid%20membranes&amp;journal=FEBS%20Lett&amp;volume=296&amp;pages=29-32&amp;publication_year=1992&amp;author=Hefti%2CA&amp;author=Ford%2CRC&amp;author=Miller%2CM&amp;author=Cox%2CRP&amp;author=Engel%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR69">Herrmann RG, Oelmueller R, Bichker J, Schneidbauer A, Stepphuhn J, Wedel N, Tyagi AK and Westhoff P (1991) The thylakoid membrane of higher plants: genes, their expression and interaction. In: Herrmann RG and Larkins BA (eds) Plant Molecular Biology, 2. Plenum, New York</p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR70">Hill R and Bendall F (1960) Function of the two cytochrome components in chloroplasts: a working hypothesis. Nature 186: 136–137</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF3cXpt1Chsw%3D%3D" aria-label="CAS reference 70">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 70" href="http://scholar.google.com/scholar_lookup?&amp;title=Function%20of%20the%20two%20cytochrome%20components%20in%20chloroplasts%3A%20a%20working%20hypothesis&amp;journal=Nature&amp;volume=186&amp;pages=136-137&amp;publication_year=1960&amp;author=Hill%2CR&amp;author=Bendall%2CF"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR71">Hippler M, Reichert J, Sutter M, Zak E, Altschmied L, Schroer U, Herrmann RG and Haehnel W (1996) The plastocyanin binding domain of Photosystem I. EMBO J 15: 6374–6384</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8978664" aria-label="PubMed reference 71">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXht1OktL0%3D" aria-label="CAS reference 71">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 71" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20plastocyanin%20binding%20domain%20of%20Photosystem%20I&amp;journal=EMBO%20J&amp;volume=15&amp;pages=6374-6384&amp;publication_year=1996&amp;author=Hippler%2CM&amp;author=Reichert%2CJ&amp;author=Sutter%2CM&amp;author=Zak%2CE&amp;author=Altschmied%2CL&amp;author=Schroer%2CU&amp;author=Herrmann%2CRG&amp;author=Haehnel%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR72">Hiyama T and Ke B (1971) A new photosynthetic pigment, 'P430': its possible role as the primary electron acceptor of Photosystem I. Proc Natl Acad Sci USA 68: 1010–1013</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4995817" aria-label="PubMed reference 72">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3MXktFKhu7Y%3D" aria-label="CAS reference 72">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 72" href="http://scholar.google.com/scholar_lookup?&amp;title=A%20new%20photosynthetic%20pigment%2C%20%27P430%27%3A%20its%20possible%20role%20as%20the%20primary%20electron%20acceptor%20of%20Photosystem%20I&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=68&amp;pages=1010-1013&amp;publication_year=1971&amp;author=Hiyama%2CT&amp;author=Ke%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR73">Høj PB, Svendsen I, Scheller HV and Møller BL (1987) Identification of a chloroplast-encoded 9-kDa polypeptide as a 2[4Fe- 4S] protein carrying centers A and B of Photosystem I. J Biol Chem 262: 12676–12684</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=3305512" aria-label="PubMed reference 73">PubMed</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 73" href="http://scholar.google.com/scholar_lookup?&amp;title=Identification%20of%20a%20chloroplast-encoded%209-kDa%20polypeptide%20as%20a%202%5B4Fe-%204S%5D%20protein%20carrying%20centers%20A%20and%20B%20of%20Photosystem%20I&amp;journal=J%20Biol%20Chem&amp;volume=262&amp;pages=12676-12684&amp;publication_year=1987&amp;author=H%C3%B8j%2CPB&amp;author=Svendsen%2CI&amp;author=Scheller%2CHV&amp;author=M%C3%B8ller%2CBL"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR74">Ikeuchi M, Nyhus KJ, Inoue Y and Pakrasi HB (1991) Identities of four low-molecular-mass subunits of the Photosystem I complex from <i>Anabaena variabilis</i> ATCC 29413. Evidence for the presence of the psaI gene product in a cyanobacterial complex. FEBS Lett 287: 5–9</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1908790" aria-label="PubMed reference 74">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3MXmsFahtLs%3D" aria-label="CAS reference 74">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 74" href="http://scholar.google.com/scholar_lookup?&amp;title=Identities%20of%20four%20low-molecular-mass%20subunits%20of%20the%20Photosystem%20I%20complex%20from%20Anabaena%20variabilis%20ATCC%2029413.%20Evidence%20for%20the%20presence%20of%20the%20psaI%20gene%20product%20in%20a%20cyanobacterial%20complex&amp;journal=FEBS%20Lett&amp;volume=287&amp;pages=5-9&amp;publication_year=1991&amp;author=Ikeuchi%2CM&amp;author=Nyhus%2CKJ&amp;author=Inoue%2CY&amp;author=Pakrasi%2CHB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR75">Itoh S, Iwaki M and Ikegami I (1987) Extraction of vitamin K-1from Photosystem I particles by treatment with diethyl ether and its effects on the A<sup>-</sup>1 EPR signal and System I photochemistry.Biochim Biophys Acta 893: 508–516</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL2sXlslakt7Y%3D" aria-label="CAS reference 75">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 75" href="http://scholar.google.com/scholar_lookup?&amp;title=Extraction%20of%20vitamin%20K-1from%20Photosystem%20I%20particles%20by%20treatment%20with%20diethyl%20ether%20and%20its%20effects%20on%20the%20A-1%20EPR%20signal%20and%20System%20I%20photochemistry&amp;journal=Biochim%20Biophys%20Acta&amp;volume=893&amp;pages=508-516&amp;publication_year=1987&amp;author=Itoh%2CS&amp;author=Iwaki%2CM&amp;author=Ikegami%2CI"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR76">Iwaki M, Takahashi M, Shimada K, Takahashi Y and Itoh S (1992) Photoaffinity labeling of the phylloquinone-binding polypeptides by 2-azidoanthraquinone in Photosystem I particles. FEBS Lett 312: 27–30</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1426233" aria-label="PubMed reference 76">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXktVei" aria-label="CAS reference 76">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 76" href="http://scholar.google.com/scholar_lookup?&amp;title=Photoaffinity%20labeling%20of%20the%20phylloquinone-binding%20polypeptides%20by%202-azidoanthraquinone%20in%20Photosystem%20I%20particles&amp;journal=FEBS%20Lett&amp;volume=312&amp;pages=27-30&amp;publication_year=1992&amp;author=Iwaki%2CM&amp;author=Takahashi%2CM&amp;author=Shimada%2CK&amp;author=Takahashi%2CY&amp;author=Itoh%2CS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR77">Jansson S, Andersen B and Scheller HV (1996) Nearest-neighbor analysis of higher-plant Photosystem I holocomplex. Plant Physiol 112: 409–420</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8819335" aria-label="PubMed reference 77">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK28XlvFKhtLg%3D" aria-label="CAS reference 77">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 77" href="http://scholar.google.com/scholar_lookup?&amp;title=Nearest-neighbor%20analysis%20of%20higher-plant%20Photosystem%20I%20holocomplex&amp;journal=Plant%20Physiol&amp;volume=112&amp;pages=409-420&amp;publication_year=1996&amp;author=Jansson%2CS&amp;author=Andersen%2CB&amp;author=Scheller%2CHV"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR78">Jekow P, Fromme P, Witt H and Saenger W (1995) Photosystem I from <i>Synechococcus elongatus</i>: preparation and crystallization of monomers with varying subunit compositions. Biochim Biophys Acta 1229: 115–120</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 78" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20from%20Synechococcus%20elongatus%3A%20preparation%20and%20crystallization%20of%20monomers%20with%20varying%20subunit%20compositions&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1229&amp;pages=115-120&amp;publication_year=1995&amp;author=Jekow%2CP&amp;author=Fromme%2CP&amp;author=Witt%2CH&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR79">Jekow P, Fromme P, Witt H and Saenger W (1996) Crystallisation of intact and subunit L-deficient monomers from Synechocystis PCC 6803 Photosystem I. Z Naturforsch 51c: 195–199</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 79" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystallisation%20of%20intact%20and%20subunit%20L-deficient%20monomers%20from%20Synechocystis%20PCC%206803%20Photosystem%20I&amp;journal=Z%20Naturforsch&amp;volume=51c&amp;pages=195-199&amp;publication_year=1996&amp;author=Jekow%2CP&amp;author=Fromme%2CP&amp;author=Witt%2CH&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR80">Jordan P, Fromme P, Witt HT, Klukas O, Saenger W and Krauß N (2001) Three-dimensional structure of cyanobacterial Photosystem I at 2.5A resolution. Nature 411: 909–917</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11418848" aria-label="PubMed reference 80">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3MXkvVWhs78%3D" aria-label="CAS reference 80">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 80" href="http://scholar.google.com/scholar_lookup?&amp;title=Three-dimensional%20structure%20of%20cyanobacterial%20Photosystem%20I%20at%202.5A%20resolution&amp;journal=Nature&amp;volume=411&amp;pages=909-917&amp;publication_year=2001&amp;author=Jordan%2CP&amp;author=Fromme%2CP&amp;author=Witt%2CHT&amp;author=Klukas%2CO&amp;author=Saenger%2CW&amp;author=Krau%C3%9F%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR81">Kargul J, Nield J and Barber J (2003) Three-dimensional reconstruction of a light-harvesting complex I-Photosystem I (LHCI-PSI) supercomplex from the green alga <i>Chlamydomonas reinhardtii</i>. Insights into light harvesting for PSI. J Biol Chem 278: 16135–16141</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12588873" aria-label="PubMed reference 81">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3sXjt1ehtrc%3D" aria-label="CAS reference 81">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 81" href="http://scholar.google.com/scholar_lookup?&amp;title=Three-dimensional%20reconstruction%20of%20a%20light-harvesting%20complex%20I-Photosystem%20I%20%28LHCI-PSI%29%20supercomplex%20from%20the%20green%20alga%20Chlamydomonas%20reinhardtii.%20Insights%20into%20light%20harvesting%20for%20PSI&amp;journal=J%20Biol%20Chem&amp;volume=278&amp;pages=16135-16141&amp;publication_year=2003&amp;author=Kargul%2CJ&amp;author=Nield%2CJ&amp;author=Barber%2CJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR82">Kathoh S (2003) Early research on the role of plastocyanin in photosynthesis. Photosynth Res 76: 255–261</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 82" href="http://scholar.google.com/scholar_lookup?&amp;title=Early%20research%20on%20the%20role%20of%20plastocyanin%20in%20photosynthesis&amp;journal=Photosynth%20Res&amp;volume=76&amp;pages=255-261&amp;publication_year=2003&amp;author=Kathoh%2CS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR83">Katoh S and San Pietro A (1966) Activities of chloroplast fragments. I. Hill reaction and ascorbate-indophenol photoreductions.J Biol Chem 241: 3575–3581</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4380668" aria-label="PubMed reference 83">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:STN:280:DyaF2s%2FhvVCntg%3D%3D" aria-label="CAS reference 83">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 83" href="http://scholar.google.com/scholar_lookup?&amp;title=Activities%20of%20chloroplast%20fragments.%20I.%20Hill%20reaction%20and%20ascorbate-indophenol%20photoreductions&amp;journal=J%20Biol%20Chem&amp;volume=241&amp;pages=3575-3581&amp;publication_year=1966&amp;author=Katoh%2CS&amp;author=San%20Pietro%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR84">Ke B, Hansen RE and Beinert H (1973) Oxidation-reduction potentials of bound iron-sulfur proteins of Photosystem I. Proc Natl Acad Sci USA 70: 2941–2945</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16592113" aria-label="PubMed reference 84">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2cXhtFGitQ%3D%3D" aria-label="CAS reference 84">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 84" href="http://scholar.google.com/scholar_lookup?&amp;title=Oxidation-reduction%20potentials%20of%20bound%20iron-sulfur%20proteins%20of%20Photosystem%20I&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=70&amp;pages=2941-2945&amp;publication_year=1973&amp;author=Ke%2CB&amp;author=Hansen%2CRE&amp;author=Beinert%2CH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR85">Kitmitto A, Holzenburg A and Ford RC (1997) Two-dimensional crystals of Photosystem I in higher plant grana margins. J Biol Chem 272: 19497–19501</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9235952" aria-label="PubMed reference 85">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXltFSgsrs%3D" aria-label="CAS reference 85">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 85" href="http://scholar.google.com/scholar_lookup?&amp;title=Two-dimensional%20crystals%20of%20Photosystem%20I%20in%20higher%20plant%20grana%20margins&amp;journal=J%20Biol%20Chem&amp;volume=272&amp;pages=19497-19501&amp;publication_year=1997&amp;author=Kitmitto%2CA&amp;author=Holzenburg%2CA&amp;author=Ford%2CRC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR86">Kitmitto A, Mustafa AO, Holzenburg A and Ford RC (1998) Threedimensional structure of higher plant Photosystem I determined by electron crystallography. J Biol Chem 273: 29592–29599</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9792668" aria-label="PubMed reference 86">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1cXntlKqtLw%3D" aria-label="CAS reference 86">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 86" href="http://scholar.google.com/scholar_lookup?&amp;title=Threedimensional%20structure%20of%20higher%20plant%20Photosystem%20I%20determined%20by%20electron%20crystallography&amp;journal=J%20Biol%20Chem&amp;volume=273&amp;pages=29592-29599&amp;publication_year=1998&amp;author=Kitmitto%2CA&amp;author=Mustafa%2CAO&amp;author=Holzenburg%2CA&amp;author=Ford%2CRC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR87">Klukas O, Schubert WD, Jordan P, Krauß N, Fromme P, Witt HT and Saenger W(1999a) Localization of two phylloquinones, Q<sub>K</sub> and Q<span class="c-stack"> <sup>′</sup><sub>K</sub> </span>, in an improved electron density map of Photosystem I at 4Å resolution. J Biol Chem 274: 7361–7367</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=10066800" aria-label="PubMed reference 87">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1MXhvFWqt74%3D" aria-label="CAS reference 87">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 87" href="http://scholar.google.com/scholar_lookup?&amp;title=Localization%20of%20two%20phylloquinones%2C%20QK%20and%20Q%20K%20%E2%80%B2%20%2C%20in%20an%20improved%20electron%20density%20map%20of%20Photosystem%20I%20at%204%C3%85%20resolution&amp;journal=J%20Biol%20Chem&amp;volume=274&amp;pages=7361-7367&amp;publication_year=1999&amp;author=Klukas%2CO&amp;author=Schubert%2CWD&amp;author=Jordan%2CP&amp;author=Krau%C3%9F%2CN&amp;author=Fromme%2CP&amp;author=Witt%2CHT&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR88">Klukas O, Schubert WD, Jordan P, Krauß N, Fromme P, Witt HT and Saenger W (1999b) Photosystem I, an improved model of the stromal subunits PsaC, PsaD, and PsaE. J Biol Chem 274: 7351–7360</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=10066799" aria-label="PubMed reference 88">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1MXhvFWqtrY%3D" aria-label="CAS reference 88">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 88" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%2C%20an%20improved%20model%20of%20the%20stromal%20subunits%20PsaC%2C%20PsaD%2C%20and%20PsaE&amp;journal=J%20Biol%20Chem&amp;volume=274&amp;pages=7351-7360&amp;publication_year=1999&amp;author=Klukas%2CO&amp;author=Schubert%2CWD&amp;author=Jordan%2CP&amp;author=Krau%C3%9F%2CN&amp;author=Fromme%2CP&amp;author=Witt%2CHT&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR89">Knoetzel J, Mant A, Haldrup A, Jensen PE and Scheller HV (2002) PSI-O, a new 10-kDa subunit of eukaryotic Photosystem I. FEBS Lett 510: 145–148</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11801243" aria-label="PubMed reference 89">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38XktFehsw%3D%3D" aria-label="CAS reference 89">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 89" href="http://scholar.google.com/scholar_lookup?&amp;title=PSI-O%2C%20a%20new%2010-kDa%20subunit%20of%20eukaryotic%20Photosystem%20I&amp;journal=FEBS%20Lett&amp;volume=510&amp;pages=145-148&amp;publication_year=2002&amp;author=Knoetzel%2CJ&amp;author=Mant%2CA&amp;author=Haldrup%2CA&amp;author=Jensen%2CPE&amp;author=Scheller%2CHV"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR90">Koike K, Ikeuchi M, Hiyama T and Inoue Y (1989) Identification of Photosystem I components from the cyanobacterium <i>Synechococcus vulcanus</i> by N-terminal sequencing. FEBS Lett 253: 257–263</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=2503399" aria-label="PubMed reference 90">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3cXkvVWr" aria-label="CAS reference 90">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 90" href="http://scholar.google.com/scholar_lookup?&amp;title=Identification%20of%20Photosystem%20I%20components%20from%20the%20cyanobacterium%20Synechococcus%20vulcanus%20by%20N-terminal%20sequencing&amp;journal=FEBS%20Lett&amp;volume=253&amp;pages=257-263&amp;publication_year=1989&amp;author=Koike%2CK&amp;author=Ikeuchi%2CM&amp;author=Hiyama%2CT&amp;author=Inoue%2CY"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR91">Kok B (1956) On the reversible absorption changes at 705 nm in photosynthetic organisms. Biochim Biophys Acta 22: 399–401</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=13382864" aria-label="PubMed reference 91">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaG2sXhsl2ltw%3D%3D" aria-label="CAS reference 91">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 91" href="http://scholar.google.com/scholar_lookup?&amp;title=On%20the%20reversible%20absorption%20changes%20at%20705%20nm%20in%20photosynthetic%20organisms&amp;journal=Biochim%20Biophys%20Acta&amp;volume=22&amp;pages=399-401&amp;publication_year=1956&amp;author=Kok%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR92">Krauß N, Hinrichs W, Witt I, Fromme P, Pritzkow W, Dauter Z, Betzel C, Wilson KS, Witt HT and Saenger W (1993) Three-dimensional structure of System I of photosynthesis at 6Å resolution. Nature 361: 326–361</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 92" href="http://scholar.google.com/scholar_lookup?&amp;title=Three-dimensional%20structure%20of%20System%20I%20of%20photosynthesis%20at%206%C3%85%20resolution&amp;journal=Nature&amp;volume=361&amp;pages=326-361&amp;publication_year=1993&amp;author=Krau%C3%9F%2CN&amp;author=Hinrichs%2CW&amp;author=Witt%2CI&amp;author=Fromme%2CP&amp;author=Pritzkow%2CW&amp;author=Dauter%2CZ&amp;author=Betzel%2CC&amp;author=Wilson%2CKS&amp;author=Witt%2CHT&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR93">Krau#x00DF; N, Schubert WD, Klukas O, Fromme P, Witt HT and Saenger W (1996) Photosystem I at 4Å resolution represents the first structural model of a joint photosynthetic reaction centre and core antenna system. Nat Struct Biol 3: 965–973</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 93" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20at%204%C3%85%20resolution%20represents%20the%20first%20structural%20model%20of%20a%20joint%20photosynthetic%20reaction%20centre%20and%20core%20antenna%20system&amp;journal=Nat%20Struct%20Biol&amp;volume=3&amp;pages=965-973&amp;publication_year=1996&amp;author=Krau%23x00DF%2CN&amp;author=Schubert%2CWD&amp;author=Klukas%2CO&amp;author=Fromme%2CP&amp;author=Witt%2CHT&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR94">Kruip J, Boekema EJ, Bald D, Boonstra AF and Rögner M (1993) Isolation and structural characterization of monomeric and trimeric Photosystem I complexes (P700.FA/FB and P700.FX) from the cyanobacterium <i>Synechocystis</i> PCC 6803. J Biol Chem 268: 23353–23360</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8226860" aria-label="PubMed reference 94">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXlslOkt7g%3D" aria-label="CAS reference 94">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 94" href="http://scholar.google.com/scholar_lookup?&amp;title=Isolation%20and%20structural%20characterization%20of%20monomeric%20and%20trimeric%20Photosystem%20I%20complexes%20%28P700.FA%2FFB%20and%20P700.FX%29%20from%20the%20cyanobacterium%20Synechocystis%20PCC%206803&amp;journal=J%20Biol%20Chem&amp;volume=268&amp;pages=23353-23360&amp;publication_year=1993&amp;author=Kruip%2CJ&amp;author=Boekema%2CEJ&amp;author=Bald%2CD&amp;author=Boonstra%2CAF&amp;author=R%C3%B6gner%2CM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR95">MacMillan F, Hanley J, van der Weerd L, Knupling M, Un S and Rutherford AW (1997) Orientation of the phylloquinone electron acceptor anion radical in Photosystem I. Biochemistry 36: 9297–9303</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9280439" aria-label="PubMed reference 95">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXkslerurg%3D" aria-label="CAS reference 95">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 95" href="http://scholar.google.com/scholar_lookup?&amp;title=Orientation%20of%20the%20phylloquinone%20electron%20acceptor%20anion%20radical%20in%20Photosystem%20I&amp;journal=Biochemistry&amp;volume=36&amp;pages=9297-9303&amp;publication_year=1997&amp;author=MacMillan%2CF&amp;author=Hanley%2CJ&amp;author=van%20der%20Weerd%2CL&amp;author=Knupling%2CM&amp;author=Un%2CS&amp;author=Rutherford%2CAW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR96">Malkin R and Bearden AJ (1971) Primary reactions of photosynthesis: photoreduction of a bound chloroplast ferredoxin at low temperature as detected by EPR spectroscopy. Proc Natl Acad Sci USA 68: 16–19</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4322259" aria-label="PubMed reference 96">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3MXnt12gug%3D%3D" aria-label="CAS reference 96">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 96" href="http://scholar.google.com/scholar_lookup?&amp;title=Primary%20reactions%20of%20photosynthesis%3A%20photoreduction%20of%20a%20bound%20chloroplast%20ferredoxin%20at%20low%20temperature%20as%20detected%20by%20EPR%20spectroscopy&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=68&amp;pages=16-19&amp;publication_year=1971&amp;author=Malkin%2CR&amp;author=Bearden%2CAJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR97">Mathis P, Sauer K and Rémy R (1978) Rapidly reversible flashinduced electron transfer in a P-700 chlorophyll-protein complex isolated with SDS. FEBS Lett 88: 275–278</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE1cXktl2mtbw%3D" aria-label="CAS reference 97">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 97" href="http://scholar.google.com/scholar_lookup?&amp;title=Rapidly%20reversible%20flashinduced%20electron%20transfer%20in%20a%20P-700%20chlorophyll-protein%20complex%20isolated%20with%20SDS&amp;journal=FEBS%20Lett&amp;volume=88&amp;pages=275-278&amp;publication_year=1978&amp;author=Mathis%2CP&amp;author=Sauer%2CK&amp;author=R%C3%A9my%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR98">Mühlenhoff U, Haehnel W, Witt HT and Herrmann RG (1993) Genes encoding eleven subunits of Photosystem I from the thermophilic cyanobacterium <i>Synechococcus</i> sp. Gene 127: 71–78</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=8486290" aria-label="PubMed reference 98">PubMed</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 98" href="http://scholar.google.com/scholar_lookup?&amp;title=Genes%20encoding%20eleven%20subunits%20of%20Photosystem%20I%20from%20the%20thermophilic%20cyanobacterium%20Synechococcus%20sp.&amp;journal=Gene&amp;volume=127&amp;pages=71-78&amp;publication_year=1993&amp;author=M%C3%BChlenhoff%2CU&amp;author=Haehnel%2CW&amp;author=Witt%2CHT&amp;author=Herrmann%2CRG"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR99">Mullet JE, Burke JJ and Arntzen CJ (1980) Chlorophyll proteins of Photosystem I. Plant Physiol 65: 814–822</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="10.1104/pp.65.5.814" data-track-item_id="10.1104/pp.65.5.814" data-track-value="article reference" data-track-action="article reference" href="https://doi.org/10.1104%2Fpp.65.5.814" aria-label="Article reference 99" data-doi="10.1104/pp.65.5.814">Article</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16661288" aria-label="PubMed reference 99">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3cXksVWrs78%3D" aria-label="CAS reference 99">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 99" href="http://scholar.google.com/scholar_lookup?&amp;title=Chlorophyll%20proteins%20of%20Photosystem%20I&amp;journal=Plant%20Physiol&amp;doi=10.1104%2Fpp.65.5.814&amp;volume=65&amp;pages=814-822&amp;publication_year=1980&amp;author=Mullet%2CJE&amp;author=Burke%2CJJ&amp;author=Arntzen%2CCJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR100">Nechushtai R, Muster P, Binder A, Liveanu V and Nelson N (1983) Photosystem I reaction center from the thermophilic cyanobacterium <i>Mastigocladus laminosus</i>. Proc Natl Acad Sci USA 80: 1179–1183</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16593284" aria-label="PubMed reference 100">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3sXhsVSks7k%3D" aria-label="CAS reference 100">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 100" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20reaction%20center%20from%20the%20thermophilic%20cyanobacterium%20Mastigocladus%20laminosus&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=80&amp;pages=1179-1183&amp;publication_year=1983&amp;author=Nechushtai%2CR&amp;author=Muster%2CP&amp;author=Binder%2CA&amp;author=Liveanu%2CV&amp;author=Nelson%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR101">Nelson N and Ben-Shem A (2002) Photosystem I reaction center: past and future. Photosynth Res 73: 193–206</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16245122" aria-label="PubMed reference 101">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38XnsVGltbk%3D" aria-label="CAS reference 101">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 101" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20reaction%20center%3A%20past%20and%20future&amp;journal=Photosynth%20Res&amp;volume=73&amp;pages=193-206&amp;publication_year=2002&amp;author=Nelson%2CN&amp;author=Ben-Shem%2CA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR102">Newman PJ and Sherman LA (1978) Isolation and characterization of Photosystem I and II membrane particles from the blue-green alga, <i>Synechococcus cedorum</i>. Biochim Biophys Acta 503: 343–361</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=99171" aria-label="PubMed reference 102">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE1cXltVCjsbg%3D" aria-label="CAS reference 102">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 102" href="http://scholar.google.com/scholar_lookup?&amp;title=Isolation%20and%20characterization%20of%20Photosystem%20I%20and%20II%20membrane%20particles%20from%20the%20blue-green%20alga%2C%20Synechococcus%20cedorum&amp;journal=Biochim%20Biophys%20Acta&amp;volume=503&amp;pages=343-361&amp;publication_year=1978&amp;author=Newman%2CPJ&amp;author=Sherman%2CLA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR103">Nitschke W and Rutherford AW (1991) Photosynthetic reaction centres: variations on a common structural theme? Trends Biochem Sci 16: 241–245</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1926331" aria-label="PubMed reference 103">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3MXmtVehsbc%3D" aria-label="CAS reference 103">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 103" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosynthetic%20reaction%20centres%3A%20variations%20on%20a%20common%20structural%20theme%3F&amp;journal=Trends%20Biochem%20Sci&amp;volume=16&amp;pages=241-245&amp;publication_year=1991&amp;author=Nitschke%2CW&amp;author=Rutherford%2CAW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR104">Norris JR, Uphaus RA, Crespi HL and Katz JJ (1971) Electron spin resonance of chlorophyll and the origin of Signal I in photosynthesis. Proc Natl Acad Sci USA 68: 625–628</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4993385" aria-label="PubMed reference 104">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3MXht1WmsLo%3D" aria-label="CAS reference 104">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 104" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20spin%20resonance%20of%20chlorophyll%20and%20the%20origin%20of%20Signal%20I%20in%20photosynthesis&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=68&amp;pages=625-628&amp;publication_year=1971&amp;author=Norris%2CJR&amp;author=Uphaus%2CRA&amp;author=Crespi%2CHL&amp;author=Katz%2CJJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR105">Norris JR, Scheer H, Druyan ME and Katz JJ (1974) An electronnuclear double resonance (Endor) study of the special pair model for the photoreactive chlorophyll in photosynthesis. Proc Natl Acad Sci USA 71: 4897–4900</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16592206" aria-label="PubMed reference 105">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE2MXotlahsQ%3D%3D" aria-label="CAS reference 105">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 105" href="http://scholar.google.com/scholar_lookup?&amp;title=An%20electronnuclear%20double%20resonance%20%28Endor%29%20study%20of%20the%20special%20pair%20model%20for%20the%20photoreactive%20chlorophyll%20in%20photosynthesis&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=71&amp;pages=4897-4900&amp;publication_year=1974&amp;author=Norris%2CJR&amp;author=Scheer%2CH&amp;author=Druyan%2CME&amp;author=Katz%2CJJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR106">Nuijs AM, Shuvalov VA, van Gorkom HJ, Plijter JJ and Duysens LNM (1986) Biochim Biophys Acta 850: 310–318</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL28XksFyisbw%3D" aria-label="CAS reference 106">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 106" href="http://scholar.google.com/scholar_lookup?&amp;title=&amp;journal=Biochim%20Biophys%20Acta&amp;volume=850&amp;pages=310-318&amp;publication_year=1986&amp;author=Nuijs%2CAM&amp;author=Shuvalov%2CVA&amp;author=van%20Gorkom%2CHJ&amp;author=Plijter%2CJJ&amp;author=Duysens%2CLNM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR107">Ogawa T, Obata F and Shibata K (1966) Two pigment proteins in spinach chloroplasts. Biochim Biophys Acta 112: 223–234</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5942954" aria-label="PubMed reference 107">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF28XltlOlsA%3D%3D" aria-label="CAS reference 107">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 107" href="http://scholar.google.com/scholar_lookup?&amp;title=Two%20pigment%20proteins%20in%20spinach%20chloroplasts&amp;journal=Biochim%20Biophys%20Acta&amp;volume=112&amp;pages=223-234&amp;publication_year=1966&amp;author=Ogawa%2CT&amp;author=Obata%2CF&amp;author=Shibata%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR108">Ogawa T, Vernon LP and Mollenhauer HH (1969) Properties and structure of fractions prepared from Anabaena variabilis by the action of Triton X-100. Biochim Biophys Acta 172: 216–223</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5775692" aria-label="PubMed reference 108">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF1MXnsFWksg%3D%3D" aria-label="CAS reference 108">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 108" href="http://scholar.google.com/scholar_lookup?&amp;title=Properties%20and%20structure%20of%20fractions%20prepared%20from%20Anabaena%20variabilis%20by%20the%20action%20of%20Triton%20X-100&amp;journal=Biochim%20Biophys%20Acta&amp;volume=172&amp;pages=216-223&amp;publication_year=1969&amp;author=Ogawa%2CT&amp;author=Vernon%2CLP&amp;author=Mollenhauer%2CHH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR109">Oh-oka H, Takahashi Y, Kuriyama K, Saeki K and Matsubara H (1988) The protein responsible for center A/B in spinach Photosystem I: isolation with iron-sulfur cluster(s) and complete sequence analysis. J Biochem (Tokyo) 103: 962–968</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1cXltVKlurg%3D" aria-label="CAS reference 109">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 109" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20protein%20responsible%20for%20center%20A%2FB%20in%20spinach%20Photosystem%20I%3A%20isolation%20with%20iron-sulfur%20cluster%28s%29%20and%20complete%20sequence%20analysis&amp;journal=J%20Biochem%20%28Tokyo%29&amp;volume=103&amp;pages=962-968&amp;publication_year=1988&amp;author=Oh-oka%2CH&amp;author=Takahashi%2CY&amp;author=Kuriyama%2CK&amp;author=Saeki%2CK&amp;author=Matsubara%2CH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR110">Philipson KD, Sato VL and Sauer K (1972) Exciton interaction in the Photosystem I reaction center from spinach chloroplasts. Absorption and circular dichroism difference spectra. Biochemistry 11: 4591–4595</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4654148" aria-label="PubMed reference 110">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE3sXis1Kktw%3D%3D" aria-label="CAS reference 110">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 110" href="http://scholar.google.com/scholar_lookup?&amp;title=Exciton%20interaction%20in%20the%20Photosystem%20I%20reaction%20center%20from%20spinach%20chloroplasts.%20Absorption%20and%20circular%20dichroism%20difference%20spectra&amp;journal=Biochemistry&amp;volume=11&amp;pages=4591-4595&amp;publication_year=1972&amp;author=Philipson%2CKD&amp;author=Sato%2CVL&amp;author=Sauer%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR111">Rabinowitch EI (1956) Photosynthesis and related processes, Vol II, Part 2. Interscience Publishers, London</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 111" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosynthesis%20and%20related%20processes&amp;publication_year=1956&amp;author=Rabinowitch%2CEI"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR112">Reed D and Clayton RK (1968) Isolation of a reaction center fraction from <i>Rhodopseudomonas sphaeroides</i>. Biochem Biophys Res Comm 30: 471–475</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=5645432" aria-label="PubMed reference 112">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF1cXhtFajsb8%3D" aria-label="CAS reference 112">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 112" href="http://scholar.google.com/scholar_lookup?&amp;title=Isolation%20of%20a%20reaction%20center%20fraction%20from%20Rhodopseudomonas%20sphaeroides&amp;journal=Biochem%20Biophys%20Res%20Comm&amp;volume=30&amp;pages=471-475&amp;publication_year=1968&amp;author=Reed%2CD&amp;author=Clayton%2CRK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR113">Rigby SE, Muhiuddin IP, Evans MC, Purton S and Heathcote P (2002) Photoaccumulation of the PsaB phyllosemiquinone inPhotosystem I of <i>Chlamydomonas reinhardtii</i>. Biochim Biophys Acta 1556: 13–20</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12351214" aria-label="PubMed reference 113">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38Xnt1Klsr4%3D" aria-label="CAS reference 113">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 113" href="http://scholar.google.com/scholar_lookup?&amp;title=Photoaccumulation%20of%20the%20PsaB%20phyllosemiquinone%20inPhotosystem%20I%20of%20Chlamydomonas%20reinhardtii&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1556&amp;pages=13-20&amp;publication_year=2002&amp;author=Rigby%2CSE&amp;author=Muhiuddin%2CIP&amp;author=Evans%2CMC&amp;author=Purton%2CS&amp;author=Heathcote%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR114">Rögner M, Mühlenhoff U, Boekema EJ and Witt HT (1990) Mono-, di-, and trimeric PS I reaction center complexes isolated from the thermophilic cyano-bacterium <i>Synechoccus</i> sp. Size, shape and activity. Biochim Biophys Acta 1015: 415–424</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 114" href="http://scholar.google.com/scholar_lookup?&amp;title=Mono-%2C%20di-%2C%20and%20trimeric%20PS%20I%20reaction%20center%20complexes%20isolated%20from%20the%20thermophilic%20cyano-bacterium%20Synechoccus%20sp.%20Size%2C%20shape%20and%20activity&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1015&amp;pages=415-424&amp;publication_year=1990&amp;author=R%C3%B6gner%2CM&amp;author=M%C3%BChlenhoff%2CU&amp;author=Boekema%2CEJ&amp;author=Witt%2CHT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR115">Rutherford AW and Mullet JE (1981) Reaction center triplet states in Photosystem I and Photosystem II. Biochim Biophys Acta 635: 225–235</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=6263331" aria-label="PubMed reference 115">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3MXhsFelsbY%3D" aria-label="CAS reference 115">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 115" href="http://scholar.google.com/scholar_lookup?&amp;title=Reaction%20center%20triplet%20states%20in%20Photosystem%20I%20and%20Photosystem%20II&amp;journal=Biochim%20Biophys%20Acta&amp;volume=635&amp;pages=225-235&amp;publication_year=1981&amp;author=Rutherford%2CAW&amp;author=Mullet%2CJE"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR116">Rutherford AW and Sétif P (1990) Orientation of P700, the primary electron donor of Photosystem I. Biochim Biophys Acta 1019: 128–132</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3cXlvVygt7s%3D" aria-label="CAS reference 116">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 116" href="http://scholar.google.com/scholar_lookup?&amp;title=Orientation%20of%20P700%2C%20the%20primary%20electron%20donor%20of%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1019&amp;pages=128-132&amp;publication_year=1990&amp;author=Rutherford%2CAW&amp;author=S%C3%A9tif%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR117">Sauer K, Mathis P, Acker S and van Best JA (1978) Electron acceptors associated with P-700 in Triton solubilized Photosystem I particles from spinach chloroplasts. Biochim Biophys Acta 503: 120–134</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=667024" aria-label="PubMed reference 117">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE1cXltVCjsro%3D" aria-label="CAS reference 117">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 117" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20acceptors%20associated%20with%20P-700%20in%20Triton%20solubilized%20Photosystem%20I%20particles%20from%20spinach%20chloroplasts&amp;journal=Biochim%20Biophys%20Acta&amp;volume=503&amp;pages=120-134&amp;publication_year=1978&amp;author=Sauer%2CK&amp;author=Mathis%2CP&amp;author=Acker%2CS&amp;author=van%20Best%2CJA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR118">Schoeder HU and Lockau W (1986) Phylloquinone copurifies with the large subunit of Photosystem I. FEBS Lett 199: 23–27</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL28XitVCju7c%3D" aria-label="CAS reference 118">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 118" href="http://scholar.google.com/scholar_lookup?&amp;title=Phylloquinone%20copurifies%20with%20the%20large%20subunit%20of%20Photosystem%20I&amp;journal=FEBS%20Lett&amp;volume=199&amp;pages=23-27&amp;publication_year=1986&amp;author=Schoeder%2CHU&amp;author=Lockau%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR119">Schubert WD, Klukas O, Krauß N, Saenger W, Fromme P and Witt HT (1997) Photosystem I of <i>Synechococcus elongatus</i> at 4Å resolution: comprehensive structure analysis. J Mol Biol 272: 741–769</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9368655" aria-label="PubMed reference 119">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2sXntVKqtL8%3D" aria-label="CAS reference 119">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 119" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20of%20Synechococcus%20elongatus%20at%204%C3%85%20resolution%3A%20comprehensive%20structure%20analysis&amp;journal=J%20Mol%20Biol&amp;volume=272&amp;pages=741-769&amp;publication_year=1997&amp;author=Schubert%2CWD&amp;author=Klukas%2CO&amp;author=Krau%C3%9F%2CN&amp;author=Saenger%2CW&amp;author=Fromme%2CP&amp;author=Witt%2CHT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR120">Schubert WD, Klukas O, Saenger W, Witt HT, Fromme P and Krauß N (1998) A common ancestor for oxygenic and anoxygenic photosynthetic systems: a comparison based on the structural model of Photosystem I. J Mol Biol 280: 297–314</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=9654453" aria-label="PubMed reference 120">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK1cXkslCkurg%3D" aria-label="CAS reference 120">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 120" href="http://scholar.google.com/scholar_lookup?&amp;title=A%20common%20ancestor%20for%20oxygenic%20and%20anoxygenic%20photosynthetic%20systems%3A%20a%20comparison%20based%20on%20the%20structural%20model%20of%20Photosystem%20I&amp;journal=J%20Mol%20Biol&amp;volume=280&amp;pages=297-314&amp;publication_year=1998&amp;author=Schubert%2CWD&amp;author=Klukas%2CO&amp;author=Saenger%2CW&amp;author=Witt%2CHT&amp;author=Fromme%2CP&amp;author=Krau%C3%9F%2CN"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR121">Sétif P and Brettel K (1990) Photosystem I photochemistry under highly reducing conditions: study of the P700 triplet state formation from the secondary radical pair (P700<sup>+</sup>-A<sub>1</sub> <sup>-</sup>). Biochim Biophys Acta 1020: 232–238</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 121" href="http://scholar.google.com/scholar_lookup?&amp;title=Photosystem%20I%20photochemistry%20under%20highly%20reducing%20conditions%3A%20study%20of%20the%20P700%20triplet%20state%20formation%20from%20the%20secondary%20radical%20pair%20%28P700%2B-A1%20-%29&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1020&amp;pages=232-238&amp;publication_year=1990&amp;author=S%C3%A9tif%2CP&amp;author=Brettel%2CK"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR122">Sétif P, Hervo G and Mathis P (1981) Flash-induced absorption changes in Photosystem I. Radical pair or triplet state formation? Biochim Biophys Acta 638: 257–267</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 122" href="http://scholar.google.com/scholar_lookup?&amp;title=Flash-induced%20absorption%20changes%20in%20Photosystem%20I.%20Radical%20pair%20or%20triplet%20state%20formation%3F&amp;journal=Biochim%20Biophys%20Acta&amp;volume=638&amp;pages=257-267&amp;publication_year=1981&amp;author=S%C3%A9tif%2CP&amp;author=Hervo%2CG&amp;author=Mathis%2CP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR123">Setif P, Fischer N, Lagoutte B, Bottin H and Rochaix JD (2002) The ferredoxin docking site of Photosystem I. Biochim Biophys Acta 1555: 204–209</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12206916" aria-label="PubMed reference 123">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD38Xms1yhtbw%3D" aria-label="CAS reference 123">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 123" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20ferredoxin%20docking%20site%20of%20Photosystem%20I&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1555&amp;pages=204-209&amp;publication_year=2002&amp;author=Setif%2CP&amp;author=Fischer%2CN&amp;author=Lagoutte%2CB&amp;author=Bottin%2CH&amp;author=Rochaix%2CJD"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR124">Shin M and Arnon DI (1965) Enzymic mechanisms of pyridine nucleotide reduction in chloroplasts. J Biol Chem 240: 1405–1411</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=14284756" aria-label="PubMed reference 124">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF2MXlt12jsg%3D%3D" aria-label="CAS reference 124">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 124" href="http://scholar.google.com/scholar_lookup?&amp;title=Enzymic%20mechanisms%20of%20pyridine%20nucleotide%20reduction%20in%20chloroplasts&amp;journal=J%20Biol%20Chem&amp;volume=240&amp;pages=1405-1411&amp;publication_year=1965&amp;author=Shin%2CM&amp;author=Arnon%2CDI"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR125">Shoham G, Michaeli D and Nechustai R (1990) The Photosystem I reaction center of <i>Mastigolatus laminosus</i>-structural and functional aspects. In: Baltscheffsky M (ed) Current Research in Photosynthesis, Vol 2, pp 755–762. Kluwer Academic Publishers, Dordrecht, The Netherlands</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 125" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20Photosystem%20I%20reaction%20center%20of%20Mastigolatus%20laminosus-structural%20and%20functional%20aspects&amp;pages=755-762&amp;publication_year=1990&amp;author=Shoham%2CG&amp;author=Michaeli%2CD&amp;author=Nechustai%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR126">Shuvalov VA (1976) The study of the primary photoprocesses in Photosystem I of chloroplasts. Recombination luminescence, chlorophyll triplet state and triplet-triplet annihilation. Biochim Biophys Acta 430: 113–121</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=1260043" aria-label="PubMed reference 126">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaE28XhslKrt78%3D" aria-label="CAS reference 126">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 126" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20study%20of%20the%20primary%20photoprocesses%20in%20Photosystem%20I%20of%20chloroplasts.%20Recombination%20luminescence%2C%20chlorophyll%20triplet%20state%20and%20triplet-triplet%20annihilation&amp;journal=Biochim%20Biophys%20Acta&amp;volume=430&amp;pages=113-121&amp;publication_year=1976&amp;author=Shuvalov%2CVA"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR127">Takahashi Y and Katoh S (1982) Functional subunit structure of Photosystem I reaction center in <i>Synechococcus</i> sp. Arch Biochem Biophys 219: 219–227</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=6295282" aria-label="PubMed reference 127">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL38XlvFKjsrY%3D" aria-label="CAS reference 127">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 127" href="http://scholar.google.com/scholar_lookup?&amp;title=Functional%20subunit%20structure%20of%20Photosystem%20I%20reaction%20center%20in%20Synechococcus%20sp&amp;journal=Arch%20Biochem%20Biophys&amp;volume=219&amp;pages=219-227&amp;publication_year=1982&amp;author=Takahashi%2CY&amp;author=Katoh%2CS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR128">Thornber JP, Alberte RS, Hunter FA, Shiozawa JA and Kan KS (1976) The organization of chlorophyll in the plant photosynthetic unit. Brookhaven Symp Biol 28: 132–148</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=830042" aria-label="PubMed reference 128">PubMed</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 128" href="http://scholar.google.com/scholar_lookup?&amp;title=The%20organization%20of%20chlorophyll%20in%20the%20plant%20photosynthetic%20unit&amp;journal=Brookhaven%20Symp%20Biol&amp;volume=28&amp;pages=132-148&amp;publication_year=1976&amp;author=Thornber%2CJP&amp;author=Alberte%2CRS&amp;author=Hunter%2CFA&amp;author=Shiozawa%2CJA&amp;author=Kan%2CKS"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR129">Tsiotis G, Nitschke W, Haase W and Michel H (1993) Purification and crystallisation of Photosystem I complex from a phycobilisome-less mutant of the cyanobacterial <i>Synechococcus</i> PCC 7002. Photosynth Res 35: 285–297</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXlvF2ku78%3D" aria-label="CAS reference 129">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 129" href="http://scholar.google.com/scholar_lookup?&amp;title=Purification%20and%20crystallisation%20of%20Photosystem%20I%20complex%20from%20a%20phycobilisome-less%20mutant%20of%20the%20cyanobacterial%20Synechococcus%20PCC%207002&amp;journal=Photosynth%20Res&amp;volume=35&amp;pages=285-297&amp;publication_year=1993&amp;author=Tsiotis%2CG&amp;author=Nitschke%2CW&amp;author=Haase%2CW&amp;author=Michel%2CH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR130">van der Staay GWM, Boekema EJ, Dekker JP and Matthijs HCP (1993) Characterization of trimeric Photosystem I particles from prochlorophyte <i>Prochlorothrix hollandica</i> by electron microscopy and image analysis. Biochim Biophys Acta 1142: 189–193</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK3sXktVGju7o%3D" aria-label="CAS reference 130">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 130" href="http://scholar.google.com/scholar_lookup?&amp;title=Characterization%20of%20trimeric%20Photosystem%20I%20particles%20from%20prochlorophyte%20Prochlorothrix%20hollandica%20by%20electron%20microscopy%20and%20image%20analysis&amp;journal=Biochim%20Biophys%20Acta&amp;volume=1142&amp;pages=189-193&amp;publication_year=1993&amp;author=van%20der%20Staay%2CGWM&amp;author=Boekema%2CEJ&amp;author=Dekker%2CJP&amp;author=Matthijs%2CHCP"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR131">Vermaas WFJ (1994) Evolution of heliobacteria: implications for photosynthetic reaction center complexes. Photosynth Res 41: 285–294</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=11539188" aria-label="PubMed reference 131">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK2cXmtVWitr8%3D" aria-label="CAS reference 131">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 131" href="http://scholar.google.com/scholar_lookup?&amp;title=Evolution%20of%20heliobacteria%3A%20implications%20for%20photosynthetic%20reaction%20center%20complexes&amp;journal=Photosynth%20Res&amp;volume=41&amp;pages=285-294&amp;publication_year=1994&amp;author=Vermaas%2CWFJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR132">Vernon LP, Shaw ER and Ke B (1966) A photochemically active particle derived from chloroplasts by the action of the detergent Triton X-100. J Biol Chem 241: 4101–4109</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4380688" aria-label="PubMed reference 132">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF28XksFylsb8%3D" aria-label="CAS reference 132">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 132" href="http://scholar.google.com/scholar_lookup?&amp;title=A%20photochemically%20active%20particle%20derived%20from%20chloroplasts%20by%20the%20action%20of%20the%20detergent%20Triton%20X-100&amp;journal=J%20Biol%20Chem&amp;volume=241&amp;pages=4101-4109&amp;publication_year=1966&amp;author=Vernon%2CLP&amp;author=Shaw%2CER&amp;author=Ke%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR133">Vrieze J, Gast P and Hoff AJ (1996) Structure of the reaction center of Photosystem I of plants. An investigation with lineardichroic absorbance-detected magnetic resonance. J Phys Chem 100: 9960–9967</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaK28XivFyns74%3D" aria-label="CAS reference 133">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 133" href="http://scholar.google.com/scholar_lookup?&amp;title=Structure%20of%20the%20reaction%20center%20of%20Photosystem%20I%20of%20plants.%20An%20investigation%20with%20lineardichroic%20absorbance-detected%20magnetic%20resonance&amp;journal=J%20Phys%20Chem&amp;volume=100&amp;pages=9960-9967&amp;publication_year=1996&amp;author=Vrieze%2CJ&amp;author=Gast%2CP&amp;author=Hoff%2CAJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR134">Watanabe T, Kobayashi M, Hongu A, Nakazato M and Hiyama T (1985) Evidence, that a chlorophyll a′ dimer constitutes the photochemical reaction centre 1 (P700) in photosynthetic apparatus.FEBS Lett 235: 252–256</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 134" href="http://scholar.google.com/scholar_lookup?&amp;title=Evidence%2C%20that%20a%20chlorophyll%20a%E2%80%B2%20dimer%20constitutes%20the%20photochemical%20reaction%20centre%201%20%28P700%29%20in%20photosynthetic%20apparatus&amp;journal=FEBS%20Lett&amp;volume=235&amp;pages=252-256&amp;publication_year=1985&amp;author=Watanabe%2CT&amp;author=Kobayashi%2CM&amp;author=Hongu%2CA&amp;author=Nakazato%2CM&amp;author=Hiyama%2CT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR135">Wessels JSC (1966) Isolation of a chloroplast fragment fraction with NADP+-photoreducing activity dependent on plastocyanin and independent of cytochrome <i>f</i>. Biochim Biophys Acta 126: 581–583</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=4381622" aria-label="PubMed reference 135">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF2sXis1WnsA%3D%3D" aria-label="CAS reference 135">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 135" href="http://scholar.google.com/scholar_lookup?&amp;title=Isolation%20of%20a%20chloroplast%20fragment%20fraction%20with%20NADP%2B-photoreducing%20activity%20dependent%20on%20plastocyanin%20and%20independent%20of%20cytochrome%20f&amp;journal=Biochim%20Biophys%20Acta&amp;volume=126&amp;pages=581-583&amp;publication_year=1966&amp;author=Wessels%2CJSC"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR136">Williams JC, Glazer AN and Lundell DJ (1983) Cyanobacterial Photosystem I: morphology and aggregation behavior. Proc Natl Acad Sci USA 80: 5923–5926</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=16593378" aria-label="PubMed reference 136">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL3sXlsleisrs%3D" aria-label="CAS reference 136">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 136" href="http://scholar.google.com/scholar_lookup?&amp;title=Cyanobacterial%20Photosystem%20I%3A%20morphology%20and%20aggregation%20behavior&amp;journal=Proc%20Natl%20Acad%20Sci%20USA&amp;volume=80&amp;pages=5923-5926&amp;publication_year=1983&amp;author=Williams%2CJC&amp;author=Glazer%2CAN&amp;author=Lundell%2CDJ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR137">Witt HT (2004) Steps on the way to building blocks, topologies, crystals and X-ray structural analysis of Photosystems I and II of water-oxidizing photosynthesis. Photosynth Res 80: 85–107 (this issue)</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD2cXks1Wru74%3D" aria-label="CAS reference 137">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 137" href="http://scholar.google.com/scholar_lookup?&amp;title=Steps%20on%20the%20way%20to%20building%20blocks%2C%20topologies%2C%20crystals%20and%20X-ray%20structural%20analysis%20of%20Photosystems%20I%20and%20II%20of%20water-oxidizing%20photosynthesis&amp;journal=Photosynth%20Res&amp;volume=80&amp;pages=85-107&amp;publication_year=2004&amp;author=Witt%2CHT"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR138">Witt H, Krauß N, Hinrichs W, Witt I, Fromme P and Saenger W (1992) Three-dimensional crystals of Photosystem I from <i>Synechococcus</i> sp. and X-ray structure analysis at 6Å resolution. In: Murata N (ed) Research in Photosynthesis, Vol 1, pp 521–528. Kluwer Academic Publishers, Dordrecht, The Netherlands</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 138" href="http://scholar.google.com/scholar_lookup?&amp;title=Three-dimensional%20crystals%20of%20Photosystem%20I%20from%20Synechococcus%20sp.%20and%20X-ray%20structure%20analysis%20at%206%C3%85%20resolution&amp;pages=521-528&amp;publication_year=1992&amp;author=Witt%2CH&amp;author=Krau%C3%9F%2CN&amp;author=Hinrichs%2CW&amp;author=Witt%2CI&amp;author=Fromme%2CP&amp;author=Saenger%2CW"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR139">Witt HT, Müller A and Rumberg B (1961) Experimental evidence for the mechanism of photosynthesis. Nature 191: 194–195</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=13786069" aria-label="PubMed reference 139">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaF2cXkt1KqsLw%3D" aria-label="CAS reference 139">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 139" href="http://scholar.google.com/scholar_lookup?&amp;title=Experimental%20evidence%20for%20the%20mechanism%20of%20photosynthesis&amp;journal=Nature&amp;volume=191&amp;pages=194-195&amp;publication_year=1961&amp;author=Witt%2CHT&amp;author=M%C3%BCller%2CA&amp;author=Rumberg%2CB"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR140">Witt I, Witt H, Gerken S, Saenger W, Dekker J and Rögner M(1987) Crystallization of reaction center I of photosynthesis. FEBS Lett 221: 260–264</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL2sXmtFCqurY%3D" aria-label="CAS reference 140">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 140" href="http://scholar.google.com/scholar_lookup?&amp;title=Crystallization%20of%20reaction%20center%20I%20of%20photosynthesis&amp;journal=FEBS%20Lett&amp;volume=221&amp;pages=260-264&amp;publication_year=1987&amp;author=Witt%2CI&amp;author=Witt%2CH&amp;author=Gerken%2CS&amp;author=Saenger%2CW&amp;author=Dekker%2CJ&amp;author=R%C3%B6gner%2CM"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR141">Witt I, Witt H, DiFiore D, Rögner M, Hinrichs W, Saenger W, Granzin J, Betzel C and Dauter Z (1988) X-ray characterization of single crystals of the reaction center I of water splitting photosynthesis. Ber Bunsenges Phys Chem 92: 1503–1506</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1MXnt1Ojsw%3D%3D" aria-label="CAS reference 141">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 141" href="http://scholar.google.com/scholar_lookup?&amp;title=X-ray%20characterization%20of%20single%20crystals%20of%20the%20reaction%20center%20I%20of%20water%20splitting%20photosynthesis&amp;journal=Ber%20Bunsenges%20Phys%20Chem&amp;volume=92&amp;pages=1503-1506&amp;publication_year=1988&amp;author=Witt%2CI&amp;author=Witt%2CH&amp;author=DiFiore%2CD&amp;author=R%C3%B6gner%2CM&amp;author=Hinrichs%2CW&amp;author=Saenger%2CW&amp;author=Granzin%2CJ&amp;author=Betzel%2CC&amp;author=Dauter%2CZ"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR142">Wynn RM, Omaha J and Malkin R (1989) Structural and functional properties of the cyanobacterial Photosystem I complex.Biochemistry 28: 5554–5560</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=2505837" aria-label="PubMed reference 142">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DyaL1MXkt1Squ78%3D" aria-label="CAS reference 142">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 142" href="http://scholar.google.com/scholar_lookup?&amp;title=Structural%20and%20functional%20properties%20of%20the%20cyanobacterial%20Photosystem%20I%20complex&amp;journal=Biochemistry&amp;volume=28&amp;pages=5554-5560&amp;publication_year=1989&amp;author=Wynn%2CRM&amp;author=Omaha%2CJ&amp;author=Malkin%2CR"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR143">Xu W, Chitnis PR, Valieva A, Van Der Est A, Pushkar J, Krzystyniak M, Teutloff C, Zech SG, Bittl R, Stehlik D, Zybailov B, Shen G and Golbeck JH (2003a) Electron transfer in cyanobacterial Photosystem I. Physiological and spectroscopic characterization of site-directed mutants in a putative electron transfer pathway from A0 through A1 to FX. J Biol Chem 278: 27864–27875</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12721305" aria-label="PubMed reference 143">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3sXlsFKkurw%3D" aria-label="CAS reference 143">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 143" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20in%20cyanobacterial%20Photosystem%20I.%20Physiological%20and%20spectroscopic%20characterization%20of%20site-directed%20mutants%20in%20a%20putative%20electron%20transfer%20pathway%20from%20A0%20through%20A1%20to%20FX&amp;journal=J%20Biol%20Chem&amp;volume=278&amp;pages=27864-27875&amp;publication_year=2003&amp;author=Xu%2CW&amp;author=Chitnis%2CPR&amp;author=Valieva%2CA&amp;author=Van%20Der%20Est%2CA&amp;author=Pushkar%2CJ&amp;author=Krzystyniak%2CM&amp;author=Teutloff%2CC&amp;author=Zech%2CSG&amp;author=Bittl%2CR&amp;author=Stehlik%2CD&amp;author=Zybailov%2CB&amp;author=Shen%2CG&amp;author=Golbeck%2CJH"> Google Scholar</a>  </p></li><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR144">Xu W, Chitnis PR, Valieva A, Van der Est A, Brettel K, Guergova-Kuras M, Pushkar YN, Zech SG, Stehlik D, Shen G, Zybailov B and Golbeck JH (2003b) Electron transfer in cyanobacterial Photosystem I: II. Determination of the forward electron transfer rates of site-directed mutants in a putative electron transfer pathway from A0 through A1 to FX. J Biol Chem 278: 27876–27887</p><p class="c-article-references__links u-hide-print"><a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="pubmed reference" data-track-action="pubmed reference" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;dopt=Abstract&amp;list_uids=12721306" aria-label="PubMed reference 144">PubMed</a>  <a data-track="click_references" rel="nofollow noopener" data-track-label="link" data-track-item_id="link" data-track-value="cas reference" data-track-action="cas reference" href="/articles/cas-redirect/1:CAS:528:DC%2BD3sXlsFKkur0%3D" aria-label="CAS reference 144">CAS</a>  <a data-track="click_references" data-track-action="google scholar reference" data-track-value="google scholar reference" data-track-label="link" data-track-item_id="link" rel="nofollow noopener" aria-label="Google Scholar reference 144" href="http://scholar.google.com/scholar_lookup?&amp;title=Electron%20transfer%20in%20cyanobacterial%20Photosystem%20I%3A%20II.%20Determination%20of%20the%20forward%20electron%20transfer%20rates%20of%20site-directed%20mutants%20in%20a%20putative%20electron%20transfer%20pathway%20from%20A0%20through%20A1%20to%20FX&amp;journal=J%20Biol%20Chem&amp;volume=278&amp;pages=27876-27887&amp;publication_year=2003&amp;author=Xu%2CW&amp;author=Chitnis%2CPR&amp;author=Valieva%2CA&amp;author=Van%20der%20Est%2CA&amp;author=Brettel%2CK&amp;author=Guergova-Kuras%2CM&amp;author=Pushkar%2CYN&amp;author=Zech%2CSG&amp;author=Stehlik%2CD&amp;author=Shen%2CG&amp;author=Zybailov%2CB&amp;author=Golbeck%2CJH"> Google Scholar</a>  </p></li></ul><p class="c-article-references__download u-hide-print"><a data-track="click" data-track-action="download citation references" data-track-label="link" rel="nofollow" href="https://citation-needed.springer.com/v2/references/10.1023/B:PRES.0000030657.88242.e1?format=refman&amp;flavour=references">Download references<svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-download-medium"></use></svg></a></p></div></div></div></section></div><section aria-labelledby="author-information" data-title="Author information"><div class="c-article-section" id="author-information-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="author-information">Author information</h2><div class="c-article-section__content" id="author-information-content"><h3 class="c-article__sub-heading" id="affiliations">Authors and Affiliations</h3><ol class="c-article-author-affiliation__list"><li id="Aff1"><p class="c-article-author-affiliation__address">Department of Chemistry and Biochemistry, Arizona State University, Main Campus Room PSC-307, PO Box 871604, Tempe, AZ, 85287-1604, USA</p><p class="c-article-author-affiliation__authors-list">Petra Fromme</p></li><li id="Aff2"><p class="c-article-author-affiliation__address">Département de Biologie Cellulaire et Moléculaire CEA Saclay, Section de Bioénergétique, 91191, Gif-sur-Yvette, Cedex, France</p><p class="c-article-author-affiliation__authors-list">Paul Mathis</p></li></ol><div class="u-js-hide u-hide-print" data-test="author-info"><span class="c-article__sub-heading">Authors</span><ol class="c-article-authors-search u-list-reset"><li id="auth-Petra-Fromme-Aff1"><span class="c-article-authors-search__title u-h3 js-search-name">Petra Fromme</span><div class="c-article-authors-search__list"><div class="c-article-authors-search__item c-article-authors-search__list-item--left"><a href="/search?dc.creator=Petra%20Fromme" class="c-article-button" data-track="click" data-track-action="author link - publication" data-track-label="link" rel="nofollow">View author publications</a></div><div class="c-article-authors-search__item c-article-authors-search__list-item--right"><p class="search-in-title-js c-article-authors-search__text">You can also search for this author in <span class="c-article-identifiers"><a class="c-article-identifiers__item" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;term=Petra%20Fromme" data-track="click" data-track-action="author link - pubmed" data-track-label="link" rel="nofollow">PubMed</a><span class="u-hide"> </span><a class="c-article-identifiers__item" href="http://scholar.google.co.uk/scholar?as_q=&amp;num=10&amp;btnG=Search+Scholar&amp;as_epq=&amp;as_oq=&amp;as_eq=&amp;as_occt=any&amp;as_sauthors=%22Petra%20Fromme%22&amp;as_publication=&amp;as_ylo=&amp;as_yhi=&amp;as_allsubj=all&amp;hl=en" data-track="click" data-track-action="author link - scholar" data-track-label="link" rel="nofollow">Google Scholar</a></span></p></div></div></li><li id="auth-Paul-Mathis-Aff2"><span class="c-article-authors-search__title u-h3 js-search-name">Paul Mathis</span><div class="c-article-authors-search__list"><div class="c-article-authors-search__item c-article-authors-search__list-item--left"><a href="/search?dc.creator=Paul%20Mathis" class="c-article-button" data-track="click" data-track-action="author link - publication" data-track-label="link" rel="nofollow">View author publications</a></div><div class="c-article-authors-search__item c-article-authors-search__list-item--right"><p class="search-in-title-js c-article-authors-search__text">You can also search for this author in <span class="c-article-identifiers"><a class="c-article-identifiers__item" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;term=Paul%20Mathis" data-track="click" data-track-action="author link - pubmed" data-track-label="link" rel="nofollow">PubMed</a><span class="u-hide"> </span><a class="c-article-identifiers__item" href="http://scholar.google.co.uk/scholar?as_q=&amp;num=10&amp;btnG=Search+Scholar&amp;as_epq=&amp;as_oq=&amp;as_eq=&amp;as_occt=any&amp;as_sauthors=%22Paul%20Mathis%22&amp;as_publication=&amp;as_ylo=&amp;as_yhi=&amp;as_allsubj=all&amp;hl=en" data-track="click" data-track-action="author link - scholar" data-track-label="link" rel="nofollow">Google Scholar</a></span></p></div></div></li></ol></div></div></div></section><section data-title="Rights and permissions"><div class="c-article-section" id="rightslink-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="rightslink">Rights and permissions</h2><div class="c-article-section__content" id="rightslink-content"><p class="c-article-rights"><a data-track="click" data-track-action="view rights and permissions" data-track-label="link" href="https://s100.copyright.com/AppDispatchServlet?title=Unraveling%20the%20Photosystem%20I%20Reaction%20Center%3A%20A%20History%2C%20or%20the%20Sum%20of%20Many%20Efforts&amp;author=Petra%20Fromme%20et%20al&amp;contentID=10.1023%2FB%3APRES.0000030657.88242.e1&amp;copyright=Kluwer%20Academic%20Publishers&amp;publication=0166-8595&amp;publicationDate=2004-04&amp;publisherName=SpringerNature&amp;orderBeanReset=true">Reprints and permissions</a></p></div></div></section><section aria-labelledby="article-info" data-title="About this article"><div class="c-article-section" id="article-info-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="article-info">About this article</h2><div class="c-article-section__content" id="article-info-content"><div class="c-bibliographic-information"><div class="c-bibliographic-information__column"><h3 class="c-article__sub-heading" id="citeas">Cite this article</h3><p class="c-bibliographic-information__citation">Fromme, P., Mathis, P. Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts. <i>Photosynthesis Research</i> <b>80</b>, 109–124 (2004). https://doi.org/10.1023/B:PRES.0000030657.88242.e1</p><p class="c-bibliographic-information__download-citation u-hide-print"><a data-test="citation-link" data-track="click" data-track-action="download article citation" data-track-label="link" data-track-external="" rel="nofollow" href="https://citation-needed.springer.com/v2/references/10.1023/B:PRES.0000030657.88242.e1?format=refman&amp;flavour=citation">Download citation<svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-download-medium"></use></svg></a></p><ul class="c-bibliographic-information__list" data-test="publication-history"><li class="c-bibliographic-information__list-item"><p>Issue Date<span class="u-hide">: </span><span class="c-bibliographic-information__value"><time datetime="2004-04">April 2004</time></span></p></li><li class="c-bibliographic-information__list-item c-bibliographic-information__list-item--full-width"><p><abbr title="Digital Object Identifier">DOI</abbr><span class="u-hide">: </span><span class="c-bibliographic-information__value">https://doi.org/10.1023/B:PRES.0000030657.88242.e1</span></p></li></ul><div data-component="share-box"><div class="c-article-share-box u-display-none" hidden=""><h3 class="c-article__sub-heading">Share this article</h3><p class="c-article-share-box__description">Anyone you share the following link with will be able to read this content:</p><button class="js-get-share-url c-article-share-box__button" type="button" id="get-share-url" data-track="click" data-track-label="button" data-track-external="" data-track-action="get shareable link">Get shareable link</button><div class="js-no-share-url-container u-display-none" hidden=""><p class="js-c-article-share-box__no-sharelink-info c-article-share-box__no-sharelink-info">Sorry, a shareable link is not currently available for this article.</p></div><div class="js-share-url-container u-display-none" hidden=""><p class="js-share-url c-article-share-box__only-read-input" id="share-url" data-track="click" data-track-label="button" data-track-action="select share url"></p><button class="js-copy-share-url c-article-share-box__button--link-like" type="button" id="copy-share-url" data-track="click" data-track-label="button" data-track-action="copy share url" data-track-external="">Copy to clipboard</button></div><p class="js-c-article-share-box__additional-info c-article-share-box__additional-info"> Provided by the Springer Nature SharedIt content-sharing initiative </p></div></div><ul class="c-article-subject-list"><li class="c-article-subject-list__subject"><span><a href="/search?query=Herv%C3%A9%20Bottin&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Hervé Bottin</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Klaus%20Brettel&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Klaus Brettel</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=crystal%20structure&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">crystal structure</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=crystallization&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">crystallization</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=electron%20transfer&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">electron transfer</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Petra%20Fromme&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Petra Fromme</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Olaf%20Klukas&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Olaf Klukas</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Norbert%20Krau%C3%9F&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Norbert Krauß</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Bernard%20Lagoutte&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Bernard Lagoutte</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=light%20harvesting&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">light harvesting</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Paul%20Mathis&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Paul Mathis</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=membrane%20protein&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">membrane protein</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=microgravity&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">microgravity</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=photosynthesis&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">photosynthesis</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Photosystem%20I&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Photosystem I</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Bill%20Rutherford&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Bill Rutherford</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Wolfram%20Saenger&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Wolfram Saenger</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Wolf-Dieter%20Schubert&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Wolf-Dieter Schubert</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Pierre%20S%C3%A9tif&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Pierre Sétif</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=space%20shuttle&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">space shuttle</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=Horst%20T.%20Witt&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">Horst T. Witt</a></span></li><li class="c-article-subject-list__subject"><span><a href="/search?query=X-ray%20crystallography&amp;facet-discipline=&#34;Life%20Sciences&#34;" data-track="click" data-track-action="view keyword" data-track-label="link">X-ray crystallography</a></span></li></ul><div data-component="article-info-list"></div></div></div></div></div></section> </div> </main> <div class="c-article-sidebar u-text-sm u-hide-print l-with-sidebar__sidebar" id="sidebar" data-container-type="reading-companion" data-track-component="reading companion"> <aside> <div data-test="collections"> </div> <div data-test="editorial-summary"> </div> <div class="c-reading-companion"> <div class="c-reading-companion__sticky" data-component="reading-companion-sticky" data-test="reading-companion-sticky"> <div data-test="access-article" class="app-article-access"> <h2 class="app-article-access__heading">Access this article</h2> <div class="u-ma-16 u-clear-both"> <a href="//wayf.springernature.com?redirect_uri&#x3D;https%3A%2F%2Flink.springer.com%2Farticle%2F10.1023%2FB%3APRES.0000030657.88242.e1%3Ferror%3Dcookies_not_supported%26code%3Dc1edb4a0-c559-4894-a666-653450600278" class="u-button u-button--full-width u-button--primary u-justify-content-space-between c-pdf-download__link" data-track="click" data-track-action="institution access" data-track-label="button"> <span data-test="access-via-institution">Log in via an institution</span> <svg aria-hidden="true" focusable="false" width="24" height="24" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg> </a> </div> <div data-test="buy-box-desktop" class="c-article-buy-box"> <div class="sprcom-buybox-articleDarwin" id="sprcom-buybox-articleDarwin"> <!-- rendered: 2024-11-24T12:42:14.684793 --><!-- Darwin version --> <div class="buying-option" data-test-id="buy-article-darwin"> <div> <div class="c-springer-plus"> <h2 class="springer-plus-heading">Subscribe and save</h2> <div class="springer-plus"> <div class="springer-plus-headline"> <div class="springer-plus-title"> <svg aria-hidden="true" focusable="false" width="16" height="16" class="u-icon"> <use xlink:href="#icon-eds-i-check-filled-medium"></use> </svg><span>Springer+ Basic</span> </div> <div class="dd price-amount-springer-plus"> €32.70 /Month </div> </div> <ul class="buying-option-usps"> <li>Get 10 units per month</li> <li>Download Article/Chapter or eBook</li> <li>1 Unit = 1 Article or 1 Chapter</li> <li>Cancel anytime</li> </ul><a href="https://link.springer.com/product/springer-plus" id="btn-subscribe-springerPlus" class="u-button u-button--full-width u-button--secondary" data-track="click||click_springer_subscribe" data-track-context="buy box"><span>Subscribe now </span> <svg aria-hidden="true" focusable="false" width="16" height="16" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a> </div> <h2 class="springer-plus-heading">Buy Now</h2> </div> <div class="buybox__buy"> <form action="https://order.springer.com/public/cart" method="post"> <input type="hidden" name="type" value="article"><input type="hidden" name="doi" value="10.1023/B:PRES.0000030657.88242.e1"><input type="hidden" name="isxn" value="1573-5079"><input type="hidden" name="contenttitle" value="Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts"><input type="hidden" name="copyrightyear" value="2004"><input type="hidden" name="year" value=""><input type="hidden" name="authors" value="Petra Fromme, Paul Mathis"><input type="hidden" name="title" value="Photosynthesis Research"><input type="hidden" name="mac" value="1b6a22fbc3d55e06456b2b7deba68623"> <div class="u-ma-16"> <button type="submit" class="u-button--small u-button u-button--secondary u-button--full-width" onclick="dataLayer.push({&quot;event&quot;:&quot;addToCart&quot;,&quot;ecommerce&quot;:{&quot;currencyCode&quot;:&quot;EUR&quot;,&quot;add&quot;:{&quot;products&quot;:[{&quot;name&quot;:&quot;Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts&quot;,&quot;id&quot;:&quot;1573-5079&quot;,&quot;price&quot;:39.95,&quot;brand&quot;:&quot;Kluwer Academic Publishers&quot;,&quot;category&quot;:&quot;Plant Science&quot;,&quot;variant&quot;:&quot;ppv-article&quot;,&quot;quantity&quot;:1}]}}});"><span>Buy article PDF 39,95 €</span></button> </div> </form> <p class="c-notes__text c-notes__vat">Price includes VAT (Hong Kong/P.R.China)<br></p> <p class="c-notes__text c-notes__usp">Instant access to the full article PDF.</p> </div> </div> <script>dataLayer.push({"ecommerce":{"currency":"EUR","impressions":[{"name":"Unraveling the Photosystem I Reaction Center: A History, or the Sum of Many Efforts","id":"1573-5079","price":39.95,"brand":"Kluwer Academic Publishers","category":"Plant Science","variant":"ppv-article","quantity":1}]}});</script> <script style="display: none"> ;(function () { if (document.cookie.indexOf("feature-monetise-subscriptions-display-springer-plus") > -1) { document.querySelectorAll(".c-springer-plus").forEach(function(node) { node.style.display = "block" }) } // springerPlus roll out 10% starts here var springerPlusGroup = setLocalStorageSpringerPlus(); var rollOutSpringerPlus = springerPlusGroup === "B" function setLocalStorageSpringerPlus() { var selectUserKey = "springerPlusRollOut"; var springerPlusGroup = "X"; if (!window.localStorage) return springerPlusGroup; try { var selectUserValue = window.localStorage.getItem(selectUserKey) springerPlusGroup = selectUserValue || randomDistributionSpringerPlus(selectUserKey) } catch (err) { console.log(err) } return springerPlusGroup; } function randomDistributionSpringerPlus(selectUserKey) { var randomGroup = Math.random() < 0.9 ? "A" : "B" window.localStorage.setItem(selectUserKey, randomGroup) return randomGroup } if (rollOutSpringerPlus) { revealSpringerPlus(); } function revealSpringerPlus() { var article = document.getElementById("sprcom-buybox-articleDarwin"); if(article) { document.querySelectorAll(".c-springer-plus").forEach(function(node) { node.style.display = "block" }) } } //springerPlus ends here })() </script> <style> .springer-plus .buying-option-usps > li::before { background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg' fill='%230070A8'%3E%3Ccircle cx='50' cy='50' r='50'/%3E%3C/svg%3E"); } </style> </div> <article class="buybox__rent-article buybox__access-option u-sans-serif" id="deepdyve" style="display: none" data-test-id="journal-subscription"> <div class="c-box__body"> <div class="buybox__info"> <p>Rent this article via <a class="deepdyve-link" target="deepdyve" rel="nofollow" data-track="click" data-track-action="rent article" data-track-label="rent action, new buybox">DeepDyve</a> <svg focusable="false" role="img" aria-hidden="true" class="u-icon" style="vertical-align: middle"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-external-link-small"></use> </svg></p> </div> </div> <script> function deepDyveResponse(data) { if (data.status === 'ok') { [].slice.call(document.querySelectorAll('.buybox__rent-article')).forEach(function (article) { article.style.display = 'flex' var link = article.querySelector('.deepdyve-link') if (link) { link.setAttribute('href', data.url) } }) } } var script = document.createElement('script') script.src = '//www.deepdyve.com/rental-link?docId=10.1023/B:PRES.0000030657.88242.e1&journal=1573-5079&fieldName=journal_doi&affiliateId=springer&format=jsonp&callback=deepDyveResponse' document.body.appendChild(script) </script> </article> <div class="buybox__access-option buybox__institutional-subs-link u-sans-serif"> <p><a href="https://www.springernature.com/gp/librarians/licensing/agc/journals">Institutional subscriptions <svg aria-hidden="true" focusable="false" width="24" height="24" class="u-icon" style="vertical-align: middle"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a></p> </div> <style>.sprcom-buybox-articleDarwin .buybox__access-option{ border-top: 1px solid #cedbe0; font-size: 1rem; padding: 16px; } .sprcom-buybox-articleDarwin .c-springer-plus{ display: none; } .sprcom-buybox-articleDarwin .springer-plus{ background-color: #EBF6FF; font-family: 'Merriweather Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; padding: 16px; } .sprcom-buybox-articleDarwin .springer-plus-headline{ display: flex; justify-content: space-between; } .sprcom-buybox-articleDarwin .springer-plus-heading{ border-bottom: 1px solid #c5e0f4; border-top: 1px solid #c5e0f4; font-family: 'Merriweather Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 1.125rem; font-weight: 700; margin: 0; padding: 16px; text-align: center; } .sprcom-buybox-articleDarwin .springer-plus-title{ align-items: center; display: flex; } .sprcom-buybox-articleDarwin .springer-plus-title span{ margin-left: 8px; } .sprcom-buybox-articleDarwin .springer-plus a{ background-color: #fff; border: 1px solid #025e8d; color: #025e8d; font-size: 16px; font-weight: 700; max-height: 44px; } .sprcom-buybox-articleDarwin .springer-plus a span{ margin-right: 8px; } .sprcom-buybox-articleDarwin .springer-plus a:hover{ background-color: #025e8d; border: 4px solid #025e8d; box-shadow: none; color: #fff; font-weight: 700; } .sprcom-buybox-articleDarwin .springer-plus a:visited{ color: #025e8d; } .sprcom-buybox-articleDarwin .springer-plus a:visited:hover{ color: #fff; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps{ color: #555; font-size: 1rem; line-height: 1.6; list-style: none; margin: 0; padding: 16px 0 24px 0; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li{ padding-left: 26px; position: relative; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li::before{ content: ''; height: 10px; left: 0; position: absolute; top: calc(0.8em - 5px); width: 10px; } .sprcom-buybox-articleDarwin .springer-plus .buying-option-usps > li:not(:first-child){ margin-top: 4px; } </style> </div> </div> </div> <div class="c-reading-companion__panel c-reading-companion__sections c-reading-companion__panel--active" id="tabpanel-sections"> <div class="u-lazy-ad-wrapper u-mt-16 u-hide" data-component-mpu><div class="c-ad c-ad--300x250"> <div class="c-ad__inner"> <p class="c-ad__label">Advertisement</p> <div id="div-gpt-ad-MPU1" class="div-gpt-ad grade-c-hide" data-pa11y-ignore data-gpt data-gpt-unitpath="/270604982/springerlink/11120/article" data-gpt-sizes="300x250" data-test="MPU1-ad" data-gpt-targeting="pos=MPU1;articleid=Art11;"> </div> </div> </div> </div> </div> <div class="c-reading-companion__panel c-reading-companion__figures c-reading-companion__panel--full-width" id="tabpanel-figures"></div> <div class="c-reading-companion__panel c-reading-companion__references c-reading-companion__panel--full-width" id="tabpanel-references"></div> </div> </div> </aside> </div> </div> </article> <div class="app-elements"> <div class="eds-c-header__expander eds-c-header__expander--search" id="eds-c-header-popup-search"> <h2 class="eds-c-header__heading">Search</h2> <div class="u-container"> <search class="eds-c-header__search" role="search" aria-label="Search from the header"> <form method="GET" action="//link.springer.com/search" data-test="header-search" data-track="search" data-track-context="search from header" data-track-action="submit search form" data-track-category="unified header" data-track-label="form" > <label for="eds-c-header-search" class="eds-c-header__search-label">Search by keyword or author</label> <div class="eds-c-header__search-container"> <input id="eds-c-header-search" class="eds-c-header__search-input" autocomplete="off" name="query" type="search" value="" required> <button class="eds-c-header__search-button" type="submit"> <svg class="eds-c-header__icon" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-search-medium"></use> </svg> <span class="u-visually-hidden">Search</span> </button> </div> </form> </search> </div> </div> <div class="eds-c-header__expander eds-c-header__expander--menu" id="eds-c-header-nav"> <h2 class="eds-c-header__heading">Navigation</h2> <ul class="eds-c-header__list"> <li class="eds-c-header__list-item"> <a class="eds-c-header__link" href="https://link.springer.com/journals/" data-track="nav_find_a_journal" data-track-context="unified header" data-track-action="click find a journal" data-track-category="unified header" data-track-label="link" > Find a journal </a> </li> <li class="eds-c-header__list-item"> <a class="eds-c-header__link" href="https://www.springernature.com/gp/authors" data-track="nav_how_to_publish" data-track-context="unified header" data-track-action="click publish with us link" data-track-category="unified header" data-track-label="link" > Publish with us </a> </li> <li class="eds-c-header__list-item"> <a class="eds-c-header__link" href="https://link.springernature.com/home/" data-track="nav_track_your_research" data-track-context="unified header" data-track-action="click track your research" data-track-category="unified header" data-track-label="link" > Track your research </a> </li> </ul> </div> <footer > <div class="eds-c-footer" > <div class="eds-c-footer__container"> <div class="eds-c-footer__grid eds-c-footer__group--separator"> <div class="eds-c-footer__group"> <h3 class="eds-c-footer__heading">Discover content</h3> <ul class="eds-c-footer__list"> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://link.springer.com/journals/a/1" data-track="nav_journals_a_z" data-track-action="journals a-z" data-track-context="unified footer" data-track-label="link">Journals A-Z</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://link.springer.com/books/a/1" data-track="nav_books_a_z" data-track-action="books a-z" data-track-context="unified footer" data-track-label="link">Books A-Z</a></li> </ul> </div> <div class="eds-c-footer__group"> <h3 class="eds-c-footer__heading">Publish with us</h3> <ul class="eds-c-footer__list"> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://link.springer.com/journals" data-track="nav_journal_finder" data-track-action="journal finder" data-track-context="unified footer" data-track-label="link">Journal finder</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/authors" data-track="nav_publish_your_research" data-track-action="publish your research" data-track-context="unified footer" data-track-label="link">Publish your research</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/open-research/about/the-fundamentals-of-open-access-and-open-research" data-track="nav_open_access_publishing" data-track-action="open access publishing" data-track-context="unified footer" data-track-label="link">Open access publishing</a></li> </ul> </div> <div class="eds-c-footer__group"> <h3 class="eds-c-footer__heading">Products and services</h3> <ul class="eds-c-footer__list"> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/products" data-track="nav_our_products" data-track-action="our products" data-track-context="unified footer" data-track-label="link">Our products</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/librarians" data-track="nav_librarians" data-track-action="librarians" data-track-context="unified footer" data-track-label="link">Librarians</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/societies" data-track="nav_societies" data-track-action="societies" data-track-context="unified footer" data-track-label="link">Societies</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springernature.com/gp/partners" data-track="nav_partners_and_advertisers" data-track-action="partners and advertisers" data-track-context="unified footer" data-track-label="link">Partners and advertisers</a></li> </ul> </div> <div class="eds-c-footer__group"> <h3 class="eds-c-footer__heading">Our imprints</h3> <ul class="eds-c-footer__list"> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.springer.com/" data-track="nav_imprint_Springer" data-track-action="Springer" data-track-context="unified footer" data-track-label="link">Springer</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.nature.com/" data-track="nav_imprint_Nature_Portfolio" data-track-action="Nature Portfolio" data-track-context="unified footer" data-track-label="link">Nature Portfolio</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.biomedcentral.com/" data-track="nav_imprint_BMC" data-track-action="BMC" data-track-context="unified footer" data-track-label="link">BMC</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.palgrave.com/" data-track="nav_imprint_Palgrave_Macmillan" data-track-action="Palgrave Macmillan" data-track-context="unified footer" data-track-label="link">Palgrave Macmillan</a></li> <li class="eds-c-footer__item"><a class="eds-c-footer__link" href="https://www.apress.com/" data-track="nav_imprint_Apress" data-track-action="Apress" data-track-context="unified footer" data-track-label="link">Apress</a></li> </ul> </div> </div> </div> <div class="eds-c-footer__container"> <nav aria-label="footer navigation"> <ul class="eds-c-footer__links"> <li class="eds-c-footer__item"> <button class="eds-c-footer__link" data-cc-action="preferences" data-track="dialog_manage_cookies" data-track-action="Manage cookies" data-track-context="unified footer" data-track-label="link"><span class="eds-c-footer__button-text">Your privacy choices/Manage cookies</span></button> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://www.springernature.com/gp/legal/ccpa" data-track="nav_california_privacy_statement" data-track-action="california privacy statement" data-track-context="unified footer" data-track-label="link">Your US state privacy rights</a> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://www.springernature.com/gp/info/accessibility" data-track="nav_accessibility_statement" data-track-action="accessibility statement" data-track-context="unified footer" data-track-label="link">Accessibility statement</a> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://link.springer.com/termsandconditions" data-track="nav_terms_and_conditions" data-track-action="terms and conditions" data-track-context="unified footer" data-track-label="link">Terms and conditions</a> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://link.springer.com/privacystatement" data-track="nav_privacy_policy" data-track-action="privacy policy" data-track-context="unified footer" data-track-label="link">Privacy policy</a> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://support.springernature.com/en/support/home" data-track="nav_help_and_support" data-track-action="help and support" data-track-context="unified footer" data-track-label="link">Help and support</a> </li> <li class="eds-c-footer__item"> <a class="eds-c-footer__link" href="https://support.springernature.com/en/support/solutions/articles/6000255911-subscription-cancellations" data-track-action="cancel contracts here">Cancel contracts here</a> </li> </ul> </nav> <div class="eds-c-footer__user"> <p class="eds-c-footer__user-info"> <span data-test="footer-user-ip">8.222.208.146</span> </p> <p class="eds-c-footer__user-info" data-test="footer-business-partners">Not affiliated</p> </div> <a href="https://www.springernature.com/" class="eds-c-footer__link"> <img src="/oscar-static/images/logo-springernature-white-19dd4ba190.svg" alt="Springer Nature" loading="lazy" width="200" height="20"/> </a> <p class="eds-c-footer__legal" data-test="copyright">&copy; 2024 Springer Nature</p> </div> </div> </footer> </div> </body> </html>

Pages: 1 2 3 4 5 6 7 8 9 10