Fig. 6

DNA damage in control and drug-treated and/or irradiated DK-MG (a) and SNB19 (b) cells assessed by histone γH2AX 30 min and 24 h post-IR with 8 Gy and quantified by flow cytometry. The bar graphs are the means (± SE) of at least 3 independent experiments. The data of each cell line are normalized to the initial γH2AX content (at 30 min post-IR) detected in drug-free non-irradiated controls. “a.u.” means arbitrary units, “*” means p < 0.05