PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8392392-4 1993 Proteinases recognize a specific peptide, termed the reactive site, near the carboxyl-terminus of serpins (for antithrombin and protein C inhibitor this is Arg-Ser and for heparin cofactor II this is Leu-Ser). Leucine 200-203 serpin family C member 1 Homo sapiens 111-123