alpha-D-GlcNAc-(1->4)-beta-D-GlcA-(1->4)-alpha-D-GlcNAc-(1->4)-beta-D-GlcA-(1->3)-beta-D-Gal-(1->3)-beta-D-Gal-(1->4)-beta-D-Xyl-yl group
alpha-d-glcnac-(1->4)-beta-d-glca-(1->4)-alpha-d-glcnac-(1->4)-beta-d-glca-(1->3)-beta-d-gal-(1->3)-beta-d-gal-(1->4)-beta-d-xyl-yl group
A linear heptasaccharide glycosyl group consisisting of two <em>N</em>-acetylglucosamine residues, two glucuronic acid residues and two galactose residues linked to a xylosyl residue at the reducing end and which is commonly bonded to an amino acid residue.