Isolation and chemical composition of lipopolysaccharide from Campylobacter jejuni

Lipopolysaccharide (LPS) from three strains of Campylobacter jejuni was extracted by aqueous phenol. The sugar components present in all strains were glucose, galactose, L-glycero-D-manno-heptose and glucosamine. One strain contained, in addition, galactosamine. The fatty acids present were mainly 3-hydroxy-tetradecanoic acid and n-hexadecanoic acid. The LPS contained 2-keto-3-deoxy-octonate and phosphorus.