PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15880045-1 2005 BACKGROUND: The expression of galactose-alpha(1,3)galactose (Gal) on porcine cells represents a major barrier to xenotransplantation. galactosyl-(1-3)galactose 30-59 galanin and GMAP prepropeptide Homo sapiens 61-64 1556184-1 1992 One percent of circulating IgG in humans recognizes galactose alpha 1,3 galactose residues (anti-Gal) and is synthesized in response to stimulation by enteric bacteria. galactosyl-(1-3)galactose 52-81 galanin and GMAP prepropeptide Homo sapiens 97-100