A polysaccharide derivative consisting of a chain of 2-acetamido-2-deoxy-beta-D-galactopyranose units joined together by (1->6)-glycosidic linkages, with each unit substituted by a beta-D-glucopyranuronic acid, attached by a (1->3) linkage.
A. baumannii strain 54149 exopolysaccharide
A. haemolyticus strain 57 O-specific polysaccharide
A. haemolyticus strain 61 O-specific polysaccharide