PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3283564-2 1988 We report here that lysates of insulin secretory granules contain two distinct Ca-dependent acidic endoproteases; one (type I) cleaving exclusively on the C-terminal side of Arg 31.Arg 32 (B-chain/C-peptide junction), the other (type II) preferentially on the C-terminal side of Lys 64.Arg 65 of proinsulin (C-peptide/A-chain junction). Lysine 279-282 insulin 2 Rattus norvegicus 197-206