Recombination breakpoint analysis of aligned sequences of 3' end of cagA of 11 H . pylori strains along with the annotated H. pylori P12 strain using TOPALi. Numbers in bold above and below the peaks indicate the putative recombination breakpoint positions. The dotted horizontal line is the 95 % significance point of Dss. Start of the alignment of 3’ end sequences of cagA corresponds to the 2638 bps from the start of the cagA gene (CP001217) of H. pylori p12 strain.