PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22721770-3 2012 Xylosyltransferase-1 (XT-1) is the enzyme that initiates GAG-chain formation. Glycosaminoglycans 57-60 xylosyltransferase 1 Homo sapiens 0-20 22721770-3 2012 Xylosyltransferase-1 (XT-1) is the enzyme that initiates GAG-chain formation. Glycosaminoglycans 57-60 xylosyltransferase 1 Homo sapiens 22-26