{3)-beta-D-Galp-(1->4)-beta-D-Glcp-(1->6)-[alpha-Neup5Ac-(2->3)-beta-D-Galp-(1->4)]-beta-D-GlcpNAc-(1->}n
{3)-beta-d-galp-(1->4)-beta-d-glcp-(1->6)-[alpha-neup5ac-(2->3)-beta-d-galp-(1->4)]-beta-d-glcpnac-(1->}n
A branched polysaccharide derivative composed of a backbone of repeating β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-Glc-(1→6)-[α-Neu5Ac-(2→3)-β-<small>D</small>-Gal-(1→4)]-β-<small>D</small>-GlcNAc units, joined by (1→3)-linkages as shown. Group B <em>Streptococcus</em> (GBS) type III capsular polysaccharide.