PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15942685-7 2005 These findings, therefore, indicate that histidine residues at both P2 and P3" positions probably associate with the renin catalytic reaction for angiotensin I generation. Histidine 41-50 angiotensinogen Homo sapiens 146-159