PRotein Ontology (PRO) Release 14.0 (14-Nov-2010) There are 25948 PRO terms 298 terms are in the 'family' category. 18196 terms are in the 'gene' category. 1186 terms are in the 'sequence' category. 5687 terms are in the 'modification' category. 165 terms are in the 'organism-gene' category. 154 terms are in the 'organism-sequence' category. 88 terms are in the 'organism-modification' category. 35 terms are in the 'complex' category. 36 terms are in the 'organism-complex' category. 1491 terms have some kind of annotation, codifying the information from 965 papers. 2102 connections to GO (730 PRO terms). 374 connections to MOD (327 PRO terms). 604 connections to Pfam (362 PRO terms). 325 connections to SO (307 PRO terms). 296 annotations of a phenotype (289 PRO terms). The ontology includes a subset of terms from other ontologies and resources that are used for logical definitions.