BCR-ABL1 contributes to CML leukemia stem cells (LSCs), identified by survival promotion, the capacity of self-renewal, and differentiation to aberrant hematopoietic subsets and resistance to apoptosis through the activation of various signaling molecules and pathways in downstream of the BCR-ABL protein, to regulate leukemogenesis [4, 5]. The gene discussed is ABL1; the disease is leukemia.