MCL1 and acute lymphoblastic leukemia: We next examined the effects on cell growth (Fig. S4A) and cell death (Fig. S4B, C) of murine T-ALL (WT-1) and ETP-ALL (Tg-50) cells after treatment with increasing concentrations of a specific inhibitor of MCL1 (AZD5991), BCL2L1 (WEHI-539), in comparison with BCL2 inhibition (ABT-199) in the presence or absence of GSK-LSD1 inhibitor (100 nm).