3-O-{N-acetyl-alpha-neuraminosyl-(2->3)-beta-D-galactosyl-(1->4)-[alpha-L-fucosyl-(1->3)]-N-acetyl-beta-D-glucosaminyl-(1->3)-beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl}-L-serine(1-)  residue
3-o-{n-acetyl-alpha-neuraminosyl-(2->3)-beta-d-galactosyl-(1->4)-[alpha-l-fucosyl-(1->3)]-n-acetyl-beta-d-glucosaminyl-(1->3)-beta-d-galactosyl-(1->3)-n-acetyl-alpha-d-galactosaminyl}-l-serine(1-)  residue
An <small>L</small>-α amino acid residue obtained by deprotonation of the carboxy group of 3-<em>O</em>-{<em>N</em>-acetyl-α-neuraminosyl-(2→3)-β-<small>D</small>-galactosyl-(1→4)-[α-<small>L</small>-fucosyl-(1→3)]-<em>N</em>-acetyl-β-<small>D</small>-glucosaminyl-(1→3)-β-<small>D</small>-galactosyl-(1→3)-<em>N</em>-acetyl-α-<small>D</small>-galactosaminyl}-<small>L</small>-serine reside; major species at pH 7.3.