To test this hypothesis, P40–45 C57BL/6 Bcl6b−/− and wildtype mice were given BaP to induce gastric cancer as before during week 10–25 with or without the demethylation drug 5-Aza at a dose of 0.5 mg/kg for 15 consecutive weeks (Fig. 4a). Here, BCL6B is linked to gastric cancer.