Figure 2. Growths of H. pylori 26695 wild type (A), the Δ140 mutant (B), the Δ138 mutant (C), the Δ1222 mutant (D), and the Δ138/Δ1222 mutant (E) cultured in PP medium with/without a particular carbon source; no primary carbon source (blue circle), 5 mM D-glucose (red diamond), 10 mM L-lactate (green triangle), 10 mM D-lactate (purple square).

The cell growth was monitored by measuring the optical density at 600± SD of three independent experiments.