PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22473175-6 2010 On positively charged APS mica the GAG chains of the aggrecan molecules are distinguishable, and their average dimensions are practically unaffected by the presence of salt ions. Glycosaminoglycans 35-38 MHC class I polypeptide-related sequence A Homo sapiens 26-30