Indeed, when the combined performance of the depletion of multiple chromatin‐associated genes on MLL‐AF9 cells and normal c‐Kit+ bone marrow was considered, JMJD1C ranked first because the loss of JMJD1C led to the relatively strongest depletion of MLL‐AF9 leukemia but the relatively lowest depletion of c‐Kit+ bone marrow [10]. The gene discussed is MLLT3; the disease is leukemia.