O(3)-(poly[beta-D-GalNAc-(1->4)-beta-D-GlcA-(1->3)]-beta-D-GalNAc-(1->4)-beta-D-GlcA-(1->3)-beta-D-Gal-(1->3)-beta-D-Gal-(1->4)-beta-D-Xyl)-L-serine polyanionic residue
o(3)-(poly[beta-d-galnac-(1->4)-beta-d-glca-(1->3)]-beta-d-galnac-(1->4)-beta-d-glca-(1->3)-beta-d-gal-(1->3)-beta-d-gal-(1->4)-beta-d-xyl)-l-serine polyanionic residue
An α-amino-acid residue anion obtained by deprotonation of the carboxy groups of <em>O</em><small><sup>3</small></sup>-(poly[β-<small>D</small>-GalNAc-(1→4)-β-<small>D</small>-GlcA-(1→3)]-β-<small>D</small>-GalNAc-(1→4)-β-<small>D</small>-GlcA-(1→3)-β-<small>D</small>-Gal-(1→3)-β-<small>D</small>-Gal-(1→4)-β-<small>D</small>-Xyl)-<small>L</small>-serine residue