Protein Ontology

PRO provides an ontological representation of protein-related entities by explicitly defining them and showing the relationships between them. Each PRO term represents a distinct class of entities (including specific modified forms, orthologous isoforms, and protein complexes) ranging from the taxon-neutral to the taxon-specific. The ontology has a meta-structure encompassing three areas: proteins based on evolutionary relatedness (ProEvo); protein forms produced from a given gene locus (ProForm); and protein-containing complexes (ProComp).
PRO is funded by NIGMS / NIH grants 1R01GM080646-01, 3R01GM080646-04S1, 3R01GM080646-04S2, 5R01GM080646-05



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