C. Immunofluorescent (IF) detection of BRCA1 and RAD51 at IR-induced nuclear foci in cells expressing WT and mutant forms of Brca1. Scale bar: 10 ingD. Quantification of IF, showing proportion of cells with RAD51 foci that also had >5 BRCA1 foci. N=2.E. Quantification of IF, showing proportion of RAD51 foci that colocalized with BRCA1 foci. N=2. 