Fig. 2

A Clonogenic assay and % plating efficiency of HeLa cells treated with 30 µg/mL HSA/ZnO-NPs for 24 h before irradiation (IR) (2, 4 Gy); the number of clones was counted 14 days after IR. B Clonogenic survival analysis also demonstrated a reduction in survival. All the experiments were repeated three times. The error bars represent the standard error of the mean