The molecule is an amino disaccharide comprised of N-acetyl-alpha-D-galactosamine having an N-acetyl-D-galactosaminyl residue attached at the 3-position via a beta-linkage. It has a role as an epitope.
N-[(2R,3R,4R,5R,6R)-2-[(2S,3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide