A dose-response relationship for differential gene expression of FDXR, DDB2, POU2AF1 and WNT3 is shown in separate panels and for each examined time point after irradiation (cell culture). Fold changes are calculated with the nonirradiated samples of the same time point used as a reference (set to the value of 1) to compensate for methodological variance. Symbols reflect the geometrical mean and error bars the standard error of mean (n = 8).