Gilteritinib (4 (link)) (ASP2215; Active Biochem, Maplewood, NJ) and quizartinib (4 (link)) (AC220; Selleck Chemicals, Houston, TX), type I and II FLT3 inhibitors, respectively, clinically active in FLT3-ITD AML, were used at pharmacologically relevant concentrations (23 (link),24 (link)). The SET-sequestering PAD FTY720 (25 (link)) (Fingolimod; Cayman Chemical Company, Ann Arbor, MI) was also used at pharmacologically relevant concentrations. DT-061, an orally bioavailable small molecule activator of PP2A (SMAP) developed by reengineering tricyclic neuroleptics and proposed to directly bind the PP2A Aα subunit (26 (link)–29 (link)), was provided by Dr. Goutham Narla. The pan-Pim inhibitor AZD1208 and GSK-3β inhibitors TC-G 24 and TWS119 were from Tocris Bioscience, Minneapolis, MN, the c-Myc inhibitor 10058-F4 from Sigma-Aldrich, and the pan-AKT inhibitor MK-2206 from Selleck Chemicals, Houston, TX.