Figure 3. Effects of AxCAip53 or AxCAiLacZ infection on radiation treatment of HSC4 and SAS cells. 24 h after infection, cells were irradiated with a single exposure of 0 Gy, 1 Gy, 2 Gy, 3 Gy, 4 Gy or 6 Gy. The number of colony forming units from non-infected and non-irradiated cells is defined as 100% of the surviving fraction. Each data point represents the mean value±standard deviation from three separate experiments. (a) HSC4 cells; (b) SAS cells. ——, mock-infected cells; ——, AxCAiLacZ-infected cells; ——, AxCAip53-infected cells.