(A) Flow-cytometric analysis of cell-cycle distribution in two sensitive (MDA-MB-231 and HCT1806) and two resistant (MDA-MB-436 and CAL-120) cell lines exposed to RX-5902 for 24 hours. (B) Representative graphs for a sensitive (HCC1806) and a resistant (CAL-120) cell line treated with 100 nM RX-5902 or no drug control demonstrating cellular fractions in G1, G2/M and aneuploidy. (C) Indicated cell lines were treated with RX-5902 (0-100 nM) for 72 hours and apoptosis was assessed using the Incucyte Caspase 3/7 Green apoptosis assay with live cell microscopy. S; sensitive to RX-5902, R; resistant to RX-5902, ND; no drug control. *p<0.05, **p<0.01, ****p<0.0001,