O(3)-(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(2-) residue
o(3)-(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(2-) residue
An α-amino-acid residue anion obtained by deprotonation of the carboxy groups of <em>O</em><small><sup>3</small></sup>-(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.