Figure 4

Ratios of γ-H2AX, 53BP1 and pKAP-1 foci co-localization in HPBLs in vitro exposed to radon and its progeny.
(A) Co-localization of γ-H2AX foci and 53BP1 foci. (B) Co-localization of γ-H2AX foci and pKAP-1 foci. (C) Co-localization of 53BP1 foci and pKAP-1 foci. Two to four thousand lymphocytes from each sample were used for each pair foci quantitation. The data are presented as the mean ± standard deviation of three human blood samples. *P < 0.05, **P < 0.01, ***P < 0.001 compared with corresponding controls that were exposed to the natural background concentration of radon. Rn exp, radon exposure.