FLT3 and chronic myelogenous leukemia, BCR-ABL1 positive: We incubated MV4-11 cells, MOLM-13 cells, RS4-11 cells, and K562 cells (from a 53-year-old woman with chronic myeloid leukemia, FLT3 null) with 2 nM AC220 and 1 μM RGFP966 for 24 h.