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href="/docs/exploring-a-3d-structure/annotations">Annotations</a></td></tr></table></div><div class="item hidden" id="618272e004fb9835c6ae1895"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/exploring-a-3d-structure/experiment">Experiment</a></td></tr></table></div><div class="item hidden" id="618272fb04fb9835c6ae1896"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/exploring-a-3d-structure/sequence">Sequence</a></td></tr></table></div><div class="item hidden" id="6182730904fb9835c6ae1897"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/exploring-a-3d-structure/genome">Genome</a></td></tr></table></div><div class="item hidden" id="6182731a04fb9835c6ae1898"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/exploring-a-3d-structure/ligands">Ligands</a></td></tr></table></div><div class="item hidden" id="6182732a04fb9835c6ae1899"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/exploring-a-3d-structure/versions">Versions</a></td></tr></table></div><div class="group show" id="6256b2b3b4396e45e97bf3de" onclick="toggle("6256b2b3b4396e45e97bf3de")"><table><tr><td style="padding-left: 4px">Grouping Structures</td><td><span class="glyphicon glyphicon-triangle-bottom" id="glyph6256b2b3b4396e45e97bf3de"></span></td></tr></table></div><div class="item hidden" id="62fbafaf3b6e49562fa5c055"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/grouping-structures/overview-grouping-structures">Overview: Grouping Structures</a></td></tr></table></div><div class="item hidden" id="6081c10aec901916050494be"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/grouping-structures/sequence-based-clustering">Sequence-based Clustering</a></td></tr></table></div><div class="item hidden" id="6256b3269c3931864b07285b"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/grouping-structures/grouping-search-results">Grouping Search Results</a></td></tr></table></div><div class="item hidden" id="6256b35e9c3931864b07285c"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/grouping-structures/group-summary-pages">Group Summary Pages</a></td></tr></table></div><div class="item hidden" id="6364336066d6046810db7f11"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/grouping-structures/explore-sequence-alignments-in-3d">Explore Sequence Alignments in 3D</a></td></tr></table></div><div class="group show" id="5fd3e3a6eb210c2c5632d098" onclick="toggle("5fd3e3a6eb210c2c5632d098")"><table><tr><td style="padding-left: 4px">3D Viewers</td><td><span class="glyphicon glyphicon-triangle-bottom" id="glyph5fd3e3a6eb210c2c5632d098"></span></td></tr></table></div><div class="group hidden" id="5f98cc9614cc37a34de620ea" onclick="toggle("5f98cc9614cc37a34de620ea")"><table><tr><td style="padding-left: 24px">Mol*</td><td><span 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id="5ee1192f25aa7b208a9fe3a3"><table><tr><td class="title" style="padding-left: 44px"><a href="/docs/3d-viewers/mol*/managing-the-display">Managing the Display</a></td></tr></table></div><div class="item hidden" id="5ee13ac17f50f44e6aa4fb1f"><table><tr><td class="title" style="padding-left: 44px"><a href="/docs/3d-viewers/mol*/common-actions">Common Actions</a></td></tr></table></div><div class="item hidden" id="5ee231607f50f44e6aa4fb20"><table><tr><td class="title" style="padding-left: 44px"><a href="/docs/3d-viewers/mol*/faqs-scenarios">FAQs/Scenarios</a></td></tr></table></div><div class="item hidden" id="5ee253237f50f44e6aa4fb22"><table><tr><td class="title" style="padding-left: 44px"><a href="/docs/3d-viewers/mol*/mol*-cheat-sheet">Mol* Cheat Sheet</a></td></tr></table></div><div class="item hidden" id="60075352c5ab5836659ab2e3"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/3d-viewers/jmol">Jmol</a></td></tr></table></div><div class="item hidden" id="65a4b499c76ca3abcc925d0d"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/3d-viewers/ngl-to-mol*-ui-migration-guide">NGL to Mol* UI Migration Guide</a></td></tr></table></div><div class="group show" id="5fd3e3f4eb210c2c56332c65" onclick="toggle("5fd3e3f4eb210c2c56332c65")"><table><tr><td style="padding-left: 4px">Sequence Viewers</td><td><span class="glyphicon glyphicon-triangle-bottom" id="glyph5fd3e3f4eb210c2c56332c65"></span></td></tr></table></div><div class="item hidden" id="60103d1ab1afe64903398251"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/sequence-viewers/sequence-annotations-viewer">Sequence Annotations Viewer</a></td></tr></table></div><div class="item hidden" id="60342ff52087e87def0d0b09"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/sequence-viewers/sequence-annotations-in-3d">Sequence Annotations in 3D</a></td></tr></table></div><div class="item hidden" id="5fc7f2843fb4b83beb6a7a3d"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/sequence-viewers/genome-view">Genome View</a></td></tr></table></div><div class="item hidden" id="60182dc1ecb9a74be53123aa"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/sequence-viewers/protein-sequence-alignment-view">Protein Sequence Alignment View</a></td></tr></table></div><div class="group show" id="60132e62aeeea33d3f095fa8" onclick="toggle("60132e62aeeea33d3f095fa8")"><table><tr><td style="padding-left: 4px">Tools</td><td><span class="glyphicon glyphicon-triangle-bottom" id="glyph60132e62aeeea33d3f095fa8"></span></td></tr></table></div><div class="item hidden" id="60132e6a610d04019e01d4c2"><table><tr><td class="title" style="padding-left: 24px"><a href="/docs/tools/pairwise-structure-alignment">Pairwise Structure Alignment</a></td></tr></table></div><div class="group show" id="601024f3244a4309df5d6630" 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data-elastic-include><h5 class="menu-path">General Help</h5><h1>Data From External Resources Integrated Into RCSB PDB</h1><div><table class="content-resources"> <tbody> <tr> <td> <a href="https://alphafold.ebi.ac.uk/" target="_blank">AlphaFold DB</a> </td> <td>Computed Structure Models by AlphaFold2</td> </tr> <tr> <td> <a href="https://www.whocc.no/atc/structure_and_principles" target="_blank">ATC </a> </td> <td>Anatomical Therapeutic Chemical (ATC) Classification System from World Health Organization</td> </tr> <tr> <td> <a href="http://www.bindingdb.org" target="_blank">BindingDB</a> </td> <td>Binding affinities</td> </tr> <tr> <td> <a href=" http://api.bmrb.io/v2/mappings/bmrb/pdb?format=text&match_type=exact" target="_blank">BMRB</a> </td> <td>BMRB-to-PDB mappings</td> </tr> <tr> <td> <a href="https://card.mcmaster.ca/home" target="_blank">CARD</a> </td> <td>Comprehensive Antibiotic Resistance Database</td> </tr> <tr> <td> <a href="http://www.cathdb.info" target="_blank">CATH</a> </td> <td>Protein structure classification- Class, Architecture, Topology/fold, and Homologous superfamily</td> </tr> <tr> <td> <a href="https://www.ebi.ac.uk/chebi" target="_blank">ChEBI</a> </td> <td>Chemical entities of biological interest</td> </tr> <tr> <td> <a href="https://www.ebi.ac.uk/chembl/" target="_blank">ChEMBL</a> </td> <td>Manually curated database of bioactive molecules with drug-like properties</td> </tr> <tr> <td> <a href="https://www.ccdc.cam.ac.uk/solutions/csd-core/components/csd/" target="_blank">CSD</a> </td> <td>Cambridge Structural Database: Validated and curated small-molecule organic and metal-organic crystal structures from the Cambridge Crystallographic Data Centre</td> </tr> <tr> <td> <a href="http://www.drugbank.ca" target="_blank">DrugBank</a> </td> <td>Drug and drug target data</td> </tr> <tr> <td> <a href="http://prodata.swmed.edu/ecod/" target="_blank">ECOD</a> </td> <td>Evolutionary Classification of Protein Domains</td> </tr> <tr> <td> <a href="http://emdb-empiar.org/" target="_blank">EMDB</a> </td> <td>3DEM density maps and associated metadata</td> </tr> <tr> <td> <a href="https://www.enzyme-database.org/" target="_blank">ExplorEnz</a> </td> <td>IUBMB Enzyme nomenclature and classification</td> </tr> <tr> <td> <a href="http://www.gencodegenes.org" target="_blank">Gencode</a> </td> <td>Human and Mouse Gene annotations</td> </tr> <tr> <td> <a href="http://www.geneontology.org" target="_blank">Gene Ontology</a> </td> <td>Organization of biological data related to molecular functions, cellular components, and biological processes</td> </tr> <tr> <td> <a href="https://gtexportal.org" target="_blank">Genotype-Tissue Expression - GTEx (NIH Common Fund Data Resource)</a> </td> <td>Tissue-specific gene expression data</td> </tr> <tr> <td> <a href="https://glycosmos.org/" target="_blank">GlyCosmos </a> </td> <td>A web portal aiming to integrate the glycosciences with the life sciences about genes, proteins, lipids, pathways and diseases.</td> </tr> <tr> <td> <a href="https://glygen.org/" target="_blank">GlyGen</a> </td> <td>A data integration and dissemination resource for carbohydrate and glycoconjugate related data which provides computational and informatics resources and tools for glycosciences research.</td> </tr> <tr> <td> <a href="https://glytoucan.org/" target="_blank">GlyTouCan</a> </td> <td>An international glycan structure repository with unique accession code for each unique glycan.</td> </tr> <tr> <td> <a href="http://www.genenames.org" target="_blank">Human Gene Nomenclature Committee</a> </td> <td>Human gene name nomenclature and genomic information</td> </tr> <tr> <td> <a href="https://www.imgt.org/" target="_blank">IMGT</a> </td> <td>The international ImMunoGeneTics information system</td> </tr> <tr> <td> <a href="http://www.iedb.org" target="_blank">Immune Epitope Database</a> </td> <td>Antibody and T cell epitopes</td> </tr> <tr> <td> <a href="https://www.mousephenotype.org" target="_blank">International Mouse Phenotyping Consortium - IMPC (NIH Common Fund Data Resource)</a> </td> <td>Mouse gene phenotype data</td> </tr> <tr> <td> <a href="https://www.ebi.ac.uk/interpro/" target="_blank">InterPro</a> </td> <td>Classification of protein families</td> </tr> <tr> <td> <a href="https://www.ebi.ac.uk/thornton-srv/m-csa/" target="_blank">M-CSA</a> </td> <td>Mechanism and Catalytic Site Atlas</td> </tr> <tr> <td> <a href="http://memprotmd.bioch.ox.ac.uk/" target="_blank">MemProtMD</a> </td> <td>Annotation of transmembrane protein structures</td> </tr> <tr> <td> <a href="https://www.modelarchive.org/" target="_blank">ModelArchive</a> </td> <td>Computed Structure Models (e.g., by RoseTTAFold)</td> </tr> <tr> <td> <a href="https://mondo.monarchinitiative.org/" target="_blank">Mondo Disease Ontology</a> </td> <td>The Mondo Disease Ontology (Mondo) aims to harmonize disease definitions across the world</td> </tr> <tr> <td> <a href="https://blanco.biomol.uci.edu/mpstruc/" target="_blank">mpstruc</a> </td> <td>Classification of transmembrane protein structures</td> </tr> <tr> <td> <a href="https://www.nakb.org/" target="_blank">NAKB</a> </td> <td>Experimentally-determined nucleic acids and complex assemblies</td> </tr> <tr> <td> <a href="https://www.ncbi.nlm.nih.gov/gene" target="_blank">NCBI Gene</a> </td> <td>Gene info, reference sequences, et al.</td> </tr> <tr> <td> <a href="https://www.ncbi.nlm.nih.gov/taxonomy" target="_blank">NCBI Taxonomy</a> </td> <td>Organism Classification</td> </tr> <tr> <td> <a href="https://opm.phar.umich.edu" target="_blank">OPM</a> </td> <td>Classification of transmembrane protein structures and membrane segments</td> </tr> <tr> <td> <a href="http://www.pdbbind-cn.org" target="_blank">PDBbind-CN</a> </td> <td>Binding affinities</td> </tr> <tr> <td> <a href="http://pdbflex.org/" target="_blank">PDBflex</a> </td> <td>Protein structure flexibility</td> </tr> <tr> <td> <a href="https://pdbtm.unitmp.org/" target="_blank">PDBTM (UniTmp)</a> </td> <td>Annotation of transmembrane protein structures and membrane segments</td> </tr> <tr> <td> <a href=" https://www.ebi.ac.uk/interpro/entry/pfam/#table" target="_blank">Pfam</a> </td> <td>Protein families</td> </tr> <tr> <td> <a href="https://pharos.nih.gov" target="_blank">Pharos - Illuminating the Druggable Genome (NIH Common Fund Data Resource)</a> </td> <td>Drug targets and diseases based on ontologies available from the Drug Target Ontology, Mondo Disease Ontology, Disease Ontology, PANTHER, and GO</td> </tr> <tr> <td> <a href="http://proteindiffraction.org" target="_blank">ProteinDiffraction.org </a> </td> <td>Diffraction images </td> </tr> <tr> <td> <a href="https://pubchem.ncbi.nlm.nih.gov" target="_blank">PubChem</a> </td> <td>Chemical information</td> </tr> <tr> <td> <a href="http://www.ncbi.nlm.nih.gov/pubmed" target="_blank">PubMed</a> </td> <td>Citation information</td> </tr> <tr> <td> <a href="http://www.ncbi.nlm.nih.gov/pmc" target="_blank">PubMedCentral</a> </td> <td>Open access literature</td> </tr> <tr> <td> <a href="http://pir.georgetown.edu/resid/" target="_blank">RESID</a> </td> <td>Protein modifications</td> </tr> <tr> <td> <a href="http://opig.stats.ox.ac.uk/webapps/newsabdab/sabdab/" target="_blank">SAbDab</a> </td> <td>The Structural Antibody Database</td> </tr> <tr> <td> <a href="http://sbgrid.org" target="_blank">SBGrid</a> </td> <td>Structural Biology Data Grid / diffraction images</td> </tr> <tr> <td> <a href="https://www.ebi.ac.uk/pdbe/scop" target="_blank">SCOP</a> </td> <td>Structural Classification of Proteins</td> </tr> <tr> <td> <a href="https://scop.berkeley.edu/" target="_blank">SCOPe</a> </td> <td>Structural Classification of Proteins — extended</td> </tr> <tr> <td> <a href="http://www.ebi.ac.uk/pdbe/docs/sifts" target="_blank">SIFTS</a> </td> <td>Structure Integration with Function, Taxonomy and Sequence</td> </tr> <tr> <td> <a href="http://opig.stats.ox.ac.uk/webapps/newsabdab/therasabdab/search/" target="_blank">Thera-SAbDab </a> </td> <td>Therapeutic Structural Antibody Database</td> </tr> <tr> <td> <a href="https://www.uniprot.org" target="_blank">UniProt</a> </td> <td>Protein sequences and annotations</td> </tr> </tbody> </table> <div style="height: 20px;"></div> </div></div><br><hr><div class="item-info"><div>Please report any encountered broken links to <a href='mailto:info@rcsb.org'>info@rcsb.org</a></div><div>Last updated: 7/12/2024</div></div></div></div></div></div><div data-elastic-exclude><div class="hidden-print" id="footer_main"><div class="container" style="padding:0"><div class="row"><div class="col-md-6 col-sm-12" style="padding-left:0"> <div class="row"><div class="col-sm-4"><ul><li><span class="row_header">About</span></li><li><a href="/pages/about-us/index">About Us</a></li><li><a href="/pages/policies#References">Citing Us</a></li><li><a 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