Figure 2: A and B Show the kinetics of DNA double strand break repair after exposure of the cells to 2 Gy gamma radiation. DSB were measure by nuclear γ-H2AX foci induction which is representative of DSB. γ-H2AX foci were measured in untreated cells and those exposed to 2 Gy gamma radiations at 0.5, 3, 5 and 24 hours post treatment. Figure 2A shows the data for the MDA-MB-157 cell lines and Figure 2B for the MDA-MB-468 cell lines. Data are derived from at least three independent experiments. Error bars show standard error of the mean foci induction at each time point.