To verify our findings, we examined HAT‐L4 expression in peripheral white blood cells (n = 7) and bone marrow cells (n = 6) from normal individuals, and bone marrow cells from AML (n = 60), CML (n = 17), ALL (n = 17), and CLL (n = 5) patients. The gene discussed is TMPRSS11D; the disease is B-cell chronic lymphocytic leukemia.