Rnf2/Ring1B Ink4a−/− + KO [183] Accelerated onset of lymphomas TS Mll-Af9 + shRNA KD-cotransduced progenitors, xenotransplantedMll-Af9-transformed CD34+ human progenitors + KD shRNA [191] Impaired leukemogenesis/ex vivo maintenance of transformed phenotype ON Mll-Af9 leukemic cells...