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DSB repair after long incubation times. (A) Mean number of foci per cell for various repair times in irradiated MRC-5 cells. (B) Mean number of foci per cell after repeated daily irradiations of MRC-5 or HSF1 cells. (C) Mean number of foci per cell for various repair times in MRC-5 cells irradiated and allowed to grow. The IR-induced foci are drawn on top of the background values obtained in parallel samples (filled columns).
