N(4)-{alpha-Neu5Ac-(2->6)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-[beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->4)]-alpha-D-Man-(1->3)-[alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-[beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->6)]-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-Asn(2-) residue
n(4)-{alpha-neu5ac-(2->6)-beta-d-gal-(1->4)-beta-d-glcnac-(1->2)-[beta-d-gal-(1->4)-beta-d-glcnac-(1->4)]-alpha-d-man-(1->3)-[alpha-neu5ac-(2->3)-beta-d-gal-(1->4)-beta-d-glcnac-(1->2)-[beta-d-gal-(1->4)-beta-d-glcnac-(1->6)]-alpha-d-man-(1->6)]-beta-d-man-(1->4)-beta-d-glcnac-(1->4)-beta-d-glcnac}-l-asn(2-) residue
An anionic amino-acid residue obtained by deprotonation of the Neu5Ac carboxy groups of <em>N</em><small><sup>4</small></sup>-{α-Neu5Ac-(2→6)-β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-GlcNAc-(1→2)-[β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-GlcNAc-(1→4)]-α-<small>D</small>-Man-(1→3)-[α-Neu5Ac-(2→3)-β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-GlcNAc-(1→2)-[β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-GlcNAc-(1→6)]-α-<small>D</small>-Man-(1→6)]-β-<small>D</small>-Man-(1→4)-β-<small>D</small>-GlcNAc-(1→4)-β-<small>D</small>-GlcNAc}-<small>L</small>-Asn residue; major species at pH 7.3.