3-O-{alpha-D-GlcNAc-(1->4)-beta-D-Gal-(1->3)-[beta-D-GlcNAc-(1->6)]-alpha-D-GalNAc}-L-serine residue
3-o-{alpha-d-glcnac-(1->4)-beta-d-gal-(1->3)-[beta-d-glcnac-(1->6)]-alpha-d-galnac}-l-serine residue
An <small>L</small>-α-amino acid residue derived from 3-<em>O</em>-{α-<small>D</small>-GlcNAc-(1→4)-β-<small>D</small>-Gal-(1→3)-[β-<small>D</small>-GlcNAc-(1→6)]-α-<small>D</small>-GalNAc}-<small>L</small>-serine.