PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7773187-1 1995 Haemoblobin (Hb) was observed to inhibit the GDP/GTP exchange activity of a low M(r) GTP-binding protein, ram p25. Guanosine Diphosphate 45-48 hydroxycarboxylic acid receptor 3 Homo sapiens 85-104