PRotein Ontology (PRO) Release 24.0 (31-Oct-2011)

There are 27696 PRO terms
    4 terms are in the 'organism-family' category.
   312 terms are in the 'family' category.
  18227 terms are in the 'gene' category.
  1393 terms are in the 'sequence' category.
  6070 terms are in the 'modification' category.
   102 terms are in the 'complex' category.
   477 terms are in the 'organism-gene' category.
   412 terms are in the 'organism-sequence' category.
   392 terms are in the 'organism-modification' category.
   184 terms are in the 'organism-complex' category.
   11 terms are in the 'union' category.
1584 terms have some kind of annotation, codifying the information from 1074 papers.
  2360 connections to GO (814 PRO terms).
   374 connections to MOD (327 PRO terms).
   604 connections to Pfam (361 PRO terms).
   338 connections to SO (317 PRO terms).
   306 annotations of a phenotype (299 PRO terms).

The ontology includes a subset of terms from other ontologies and resources that are used for logical definitions.