Fig. 3: Recruitment of HR factors to DNA lesions in human colon cancer cells.

a, c Representative images of RAD51 and RPA foci in HCT116 and HT29 cells under the indicated conditions. The cells were imaged after transfection with siControl or siE2F1 for 48 h. The cells under each condition were treated with MMS (2 mM) and immunostained with anti-RPA and anti-RAD51 antibodies. Scale bars, 2.5 μm. b, d Quantitative analysis of foci formed in response to E2F1 knockdown. The numbers of foci in each condition were quantified. The scatter plots illustrate the number of RAD51 and RPA foci per individual cell (mean ± SD), and a minimum of 30 nuclei were counted for each experiment. The number of foci per nucleus was analyzed using Prism5 software