SEARCH Articles Figures Tables Biosynthesis of O-antigen Biosynthesis of the Salmonella O-Antigen Outer Capsular Polysaccharide Lipopolysaccharide O-antigen Lipopolysaccharides O-antigen Loss of O-antigen O-Antigen of Salmonella O-Antigen synthesis O-Antigenic chains O-Antigenic polysaccharide O-Antigenic polysaccharide from Shigella flexnert O-Antigens biosynthesis O-antigen chain length O-antigen diversity O-antigen gene clusters O-antigen polysaccharide O-antigen repeat Salmonella O-antigen polysaccharide Salmonella O-antigens Shigella flexnert O-antigenic polysaccharide fro Variation of O-antigens