Construction of prokaryotic expression system of ureB gene from a clinical Helicobacter pylori strain and identification of the recombinant protein immunity

Figure 2 Homology comparison of the cloned and reported H pylori ureB nucleotide sequences. (1)-(3): the reported sequences from GenBank (No. NC000915, strain 26695; No. M60398, X57132; No. AB032429); (4): the sequencing result of H pylori strain Y06 ureB gene. Underlined areas indicate the positions of primer sequences.