Effect of Rag2 deficiency on survival of H2ax^−/−p53^−/− mice. Kapplan-Meier curve representing the percentage of survival of H2ax^−/−p53^−/−Rag2^−/− (blue diamonds; n = 16) and H2ax^−/−p53^−/−Rag2^+/+ (red squares; n = 17) cohort mice versus age in days. The H2ax^−/−p53^−/−Rag2^+/+ cohort was previously characterized.¹¹