Several different CBFA2 fusion transcripts were expressed in the myeloid 32Dcl3 cell line, and show that unlike the myeloid specific fusion transcripts, the lymphoid specific ETV6/CBFA2 transcript is not compatible with myeloid cell differentiation.     ///    It is shown that myeloid cells expressing the ETV6/CBFA2 transcript undergo apoptosis in response to a G-CSF differentiation signal. 