PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8499451-6 1993 Mutation of the two asparagine carbohydrate linkage sites to aspartic acid residues led to the expression and secretion of up to 25 mg/L nonglycosylated transferrin. Aspartic Acid 61-74 transferrin Homo sapiens 153-164