This is related to the Lookup service for the protein ontology. I have been trying different PRO names and IDs and it complains that the term not found.
Metadata Term not found: PRO:000000478
However, in the obo file [Term]
id: PRO:000000478
name: smad5 isoform 2
def: "A smad5 that is a translation product of a mature transcript of the SMAD5 gene comprising intron 6 generating a C-terminus truncated MH2 domain and a unique C-terminus sequence lacking the SSxS motif necessary for SMAD activation." [EST:AA169504, PMID:10845932]
synonym: "smad5 beta" RELATED []
is_a: PRO:000000372 ! smad5
Similar things occur with other IDs.
Regards,
Cecilia Arighi
Protein Information Resource