Gene expression of DCK in t(17;19)‐ALL cell lines (median relative expression level; 0.46) was significantly lower than that in Ph+ALL cell lines (0.87, P = 0.0145 in a Mann–Whitney test) and MLL+ALL cell lines (1.07, P = 0.0187; Fig. 2A). Here, DCK is linked to acute lymphoblastic leukemia.