PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 303770-6 1977 When the new carboxy-terminal lysine was cleaved with carboxypeptidase B, singly labeled, doubly labeled, and unlabeled lysine were recovered. tyrosyl-lysine 30-36 carboxypeptidase B1 Homo sapiens 54-72