In this study we have sequenced cagC (HP0546), cagL (HP0539) from the pilus, cagV (HP0530), cagT (HP0533), and cag Gamma (HP0523) from the core complex, and cagE (HP0544) from the energy supply enzymes from HP strains isolated from gastritis and gastric cancer patients. The gene discussed is DDX53; the disease is gastric cancer.