Figure 1. Foci kinetics following an acute irradiation with 225 kV_p X-rays.

Panel A. Experimental data and fit (from eq. 3) of γ-H2AX foci after exposure to 1 Gy (full circles) and 2 Gy (open squares) for 225 kV_p X-rays. Error bars represent one standard error of the mean of 3 independent experiments. Panel B. Representative pictures of γ-H2AX foci after irradiation with 1 and 2 Gy of 225 kV_p X-rays. Upper figures represent 2 examples of a small field of view, whereas the middle and lower pictures show view at a single cell level.