[(1->3)-beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl] n
[(1->3)-beta-d-galactosyl-(1->4)-n-acetyl-beta-d-glucosaminyl] n
A glycosaminoglycan composed of a backbone of repeating β-<small>D</small>-galactosyl-(1→4)-<em>N</em>-acetyl-β-<small>D</small>-glucosamine units joined by (1→3)  linkages.