PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15735791-3 2005 Due to the specificity of an inhibitor being influenced by the amino acid residue at the P1 position, we replaced the Arg10 at P1 position of dipetarudin by a histidine, which is the P1 residue of rhodniin, a very specific thrombin inhibitor. Histidine 159-168 coagulation factor II, thrombin Homo sapiens 223-231