Confocal microscopy after γΗ2ΑX immunostaining, showing red foci in the nuclei of control (6a1,6a3) and irradiated cells (6a2,6a4), with (6a3,6a4) and without (6a1,6a2) pre-incubation with SMER28 (Fig. 6a).

<p>Computerized calculation of γH2AX foci in the nuclei of cells. Statistical significance refers to comparison with control cells (Fig. 6b).