strains cl99 and 1-1 , which possess o-antigen capsule and 74 to 77 % coverage of lipid a core oligosaccharide , were sensitive to killing in pooled normal human serum ( pnhs ) or magnesium ethylene glycoltetraacetic acid pnhs in the presence but not the absence of antibody , although 1-1 contained 35 % more lipopolysaccharide than cl99 and was slightly less sensitive to alternative pathway killing .
C0069180
o-antigen
C0023810
lipopolysaccharide