PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3080419-6 1986 This substitution is close to an Arg (residue 47) and a Trp (residue 49) which have previously been shown to be critical for heparin binding by antithrombin III. Arginine 33-36 serpin family C member 1 Homo sapiens 144-160