the o-specific polysaccharide obtained from the lipopolysaccharide of shigella dysenteriae type 1 ( shigella shiga ) by mild acid hydrolysis followed by fractionation on sephadex g-50 was found to be identical to that desribed by morgan 's group and was composed of l-rhamnose , d-galactose and n-acetyl-d-glycosamine in a ratio 2:1:1 .
C0069180
o-specific polysaccharide
C0023810
lipopolysaccharide