Subcellular localization of the MEN, MLL/MEN and truncated MLL proteins expressed in leukemic cells carrying the t(11;19)(q23;p13.1) translocation..     ///    The leukemogenesis by the t(11;19)(q23;p13.1) translocation may have resulted from the alteration of transcription regulation induced by the MLL/MEN fusion protein and/or the truncated MLL protein..     ///    "Previously, we cloned several species of MLL/MEN chimeric cDNAs in a patient with myeloid leukemia carrying the t(11;19)(q23;p13.1) translocation. "    ///    These findings suggested that MLL/MEN chimeric cDNAs were actually translated into both MLL/MEN fusion and truncated MLL proteins and that they were localized in the nucleus of leukemic cells.     ///    "We expressed the normal MEN, MLL/MEN chimeric and truncated MLL proteins in COS7 cells with the corresponding cDNAs and detected them with antibodies raised against the MEN and MLL peptides. "