the o-specific polysaccharide moiety ( o18ac polysaccharide ) of the o18ac antigen ( lipopolysaccharide ) from escherichia coli 2980 ( o18ac : k5 : fim+ : h- ) was isolated in pure form by degradation of the lipopolysaccharide and chromatography on sephadex g-50 .
C0069180
o-specific polysaccharide
C0023810
lipopolysaccharide