PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6405383-6 1983 Our findings indicate that apo A-I is synthesized as a prepropeptide, which undergoes intracellular and extracellular proteolysis to attain the major plasma apo A-I4 isoprotein form. prepropeptide 55-68 apolipoprotein A1 Homo sapiens 27-34