Fig. 3

Cytotoxicity of genotoxic agents in XPC- and CSB-deficient human TK6 cells. Survival of WT (circles), XPC^−/− (triangles), and CSB^−/− (squares) cells was shown after exposure to UVC (a), B(a) P (b), MeIQx (c), PhIP (d), γ-ray (e), and 2-AAF (f). Values presented are means ± SEM of 2–4 independent experiments. Experiments were performed as described in Materials and Methods. Significant differences are indicated by asterisks (**p < 0.01, *p < 0.05)