PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6230046-14 1984 The results also suggest a role for iduronosyl residues, and perhaps the stereochemical relationship of the carboxyl group to the O-sulfate moiety at C-2, in the recognition process. o-sulfate 130-139 complement C2 Bos taurus 150-153