PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8732754-14 1996 In trypsin, the D-Phe side chain of CtA fits between Tyr 39 and Phe 41 in a favorable manner, whereas in thrombin, these residues are Glu 39 and Leu 41. Leucine 145-148 coagulation factor II, thrombin Homo sapiens 105-113