Fig. 1
From: Lipopolysaccharide O-antigen profiles of Helicobacter pylori strains from Southwest China
LPS structural differences between Western and East-Asian H. pylori strains. A: LPS structure of Western H. pylori strains (represented by the European reference strain G27) [10]. The lipid A, core-oligosacchardie, and the O-antigen domains are indicated. G27 LPS O-antigen contains the Trio, glucan, heptan, and the distal Lewis antigen; (B): LPS structure of East-Asian H. pylori strains (represented by the Japanese strain CA2) [10, 12]. CA2 LPS O-antigen contains the Trio and the distal Lewis antigen, but lacks the intermediate glucan and heptan structures; (C): Structures of the type I and type II Lewis antigens in H. pylori