the delayed skin reactions could be shown to be specific and directed against the o-polysaccharide chain of the lipopolysaccharide since none of the lipopolysaccharide chain of the lipopolysaccharide since none of the lipopolysaccharide preparations from a rough mutant of s. typhimurium , two strains with different o-polysaccharide chains , or lipid a elicited skin reactivity .
C0023810
lipopolysaccharide
C0023767
lipid a