PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17163649-2 2006 The biosynthetic assembly line producing the toxic cyclic peptide, microcystin, contains an adenylation-peptidyl carrier protein didomain (A-PCP) at the N-terminus of the initiator module McyG (295 kDa) that has been postulated to activate and load the starter unit phenylacetate for formation of the unusual aromatic beta-amino acid residue, Adda, before subsequent extension. microcystin 67-78 adducin 1 Homo sapiens 343-347