PRotein Ontology (PRO) Release 21.0 (27-Jul-2011)

There are 27412 PRO terms
    4 terms are in the 'organism-family' category.
   306 terms are in the 'family' category.
  18213 terms are in the 'gene' category.
  1381 terms are in the 'sequence' category.
  5974 terms are in the 'modification' category.
   99 terms are in the 'complex' category.
   444 terms are in the 'organism-gene' category.
   395 terms are in the 'organism-sequence' category.
   302 terms are in the 'organism-modification' category.
   171 terms are in the 'organism-complex' category.
   11 terms are in the 'union' category.
1566 terms have some kind of annotation, codifying the information from 1057 papers.
  2332 connections to GO (795 PRO terms).
   374 connections to MOD (327 PRO terms).
   604 connections to Pfam (362 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.

_Current changes_

PSI-MOD-labels have beed added to PSI-MOD terms. These are present in the synonym line as follows: 

[Term]
id: MOD:00042
name: L-aspartic 4-phosphoric anhydride
namespace: MOD
synonym: "PhosAsp" EXACT PSI-MOD-label []
is_a: MOD:00696 ! phosphorylated residue

In addition, the line below has been added to the heading.
synonymtypedef: PSI-MOD-label "Unique short label curated by PSI-MOD" EXACT.