T‐ALL cell lines can be divided into the early progenitor types (ETP‐ALL), HSB‐2, KOPT‐K1, and DU.528, containing elevated levels of PIM kinase, and those that are more mature, SUP‐T1, HPB‐ALL and CUTLL1, and express lower levels of this protein kinase (Padi et al., 2017). Here, WEE1 is linked to acute lymphoblastic leukemia.