PRotein Ontology (PRO) Release 70.0 (08-Aug-2024) There are 258007 PRO terms in the Protein Ontology. Those representing individual proteins are mapped to 178759 UniProtKB sequences. 13 terms are in the 'polymer' category. 17 terms are in the 'organism-polymer' category. 523 terms are in the 'family' category. 23977 terms are in the 'gene' category. 29 terms are in the 'seqgroup' category. 8068 terms are in the 'sequence' category. 4969 terms are in the 'modification' category. 232 terms are in the 'complex' category. 43 terms are in the 'organism-family' category. 101177 terms are in the 'organism-gene' category. 202 terms are in the 'organism-seqgroup' category. 73476 terms are in the 'organism-sequence' category. 39170 terms are in the 'organism-modification' category. 502 terms are in the 'organism-complex' category. 21 terms are in the 'union' category. 80 terms are in the 'external' category. 2265 terms have some kind of annotation, codifying the information from 1644 papers. 4426 connections to GO (1721 PRO terms). 27 connections to SO (24 PRO terms). 610 annotations of a phenotype (585 PRO terms). The ontology includes a subset of terms from other ontologies and resources that are used for logical definitions. _Current changes_ (None) _Forthcoming changes_ (None)