PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6397195-5 1984 Since deglycosylated Tf also showed molecular weight heterogeneity, the sugar moieties of Tf other than sialic acids were not the cause of the heterogeneity. Sugars 72-77 serotransferrin Bos taurus 90-92