When these results were compared to those obtained with the 3F4 mAb used for the screening of the drugs under similar conditions, a linear correlation was obtained with a Pearson correlation coefficient of 0.966 (Figure 4F) demonstrating that fluorescently-labelled C6BC performs as well as the validated mAb for detecting γ-H2AX foci in fixed cancer cells. Here, H2AX is linked to cancer.