As indicated previously, Eμ‐myc; Pot1b∆/∆; p53+/− mice died by 8 weeks of age from fulminant, infiltrating B‐cell lymphoma, indicating that one allele of WT p53 was insufficient for complete tumor suppression in this genetic setting (Figs 4E and S1A). The gene discussed is MYC; the disease is neoplasm.