['RNF168 promotes chromosomal break localization of 53BP1 and BRCA1; 53BP1 loss rescues homologous recombination (HR) in BRCA1-deficient cells.', 'RNF168 depletion suppresses HR defects caused by BRCA1 silencing; RNF168 influences HR similarly to 53BP1.'] Is rING finger nuclear factor RNF168 important for defects in homologous recombination caused by loss of the breast cancer susceptibility factor BRCA1?