PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11278943-1 2001 Serine 525 of human prothrombin was mutated to cysteine and covalently labeled with fluorescein to make II(S525C)-fluorescein. Cysteine 47-55 coagulation factor II, thrombin Homo sapiens 20-31