Fig. 4

Colony forming abilities of SNB19 and A549 cancer cells as functions of drug and IR exposure. Control (DMSO-treated, empty circles), AZD6244- (filled squares), NVP-BEZ235- (filled triangles) and AZD6244 + NVP-BEZ235-treated cells (filled diamonds) were irradiated with single graded doses up to 8 Gy. Two weeks after IR colonies were fixed and stained using standard protocols. Experiments were performed in triplicates and repeated at least four times. Colonies containing at least 50 cells were scored as survivors