As shown in Figure 1C, t(1;19)‐ALL cell lines (median IC50; 77 ng/mL) were significantly more sensitive than Ph+ALL cell lines (435 ng/mL, P = 0.0357 in a Mann–Whitney test) and MLL+ALL cell lines (960 ng/mL, P = 0.0136). This evidence concerns the gene KMT2A and acute lymphoblastic leukemia.