Figure 1: Scatter plot showing positive correlation (r= 0.26, P< 0.05) of ABCB1 expression with sensitivity of the 60 cell lines to oxalipaltin (NSC266046). When only the cells with high P-gp expression, i.e., log2 transformed value>6, (circled area in Figure 1) were included to calculate the correlation, significantly stronger correlation was obtained (r=0.90, P<0.05). This correlation was not observed for cisplatin and other platinum analogs.