The structure of the antigenic O-polysaccharide of the lipopolysaccharide of Edwardsiella ictaluri strain MT104 Original Research Article

The structural characterization of the antigenic O-polysaccharide component of the lipopolysaccharide produced by the fish pathogenic bacterium Edwardsiella ictaluri MT104 was undertaken by the application of NMR spectroscopy and chemical analysis. The O-chain was found to be a linear polymer of a repeating tetrasaccharide unit composed of d-glucose, 2-acetamido-2-deoxy-d-galactose, and d-galactose in a 1:2:1 ratio having the structure: [→4)-α-d-Glcp-(1→4)-α-d-GalpNAc-(1→3)-β-d-GalpNAc-(1→4)-β-d-Galp-(1→]n