PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3123586-2 1987 The apoC-III polypeptide contains a carbohydrate chain containing galactosamine, galactose, and sialic acid attached in O-linkage to a threonine residue at position 74. Galactosamine 66-79 apolipoprotein C3 Homo sapiens 4-12