[4)-beta-D-Galp-(1->3)-beta-D-Galp-(1->3)-beta-D-GalpNAc-(1->]n
[4)-beta-d-galp-(1->3)-beta-d-galp-(1->3)-beta-d-galpnac-(1->]n
A polysaccharide derivative composed of a backbone of linear trisaccharide derivative repeating units that are joined to each other via β-(1→4)-linkages; corresponds to the repeating unit of the O-polysaccharide from <em>Pasteurella haemolytica</em> serotypes 1, 6 and 9.