Immunofluorescence was performed as previously described (5 (link)). Antibodies used were as follows: RAD51 (398587, 1:800, Santa Cruz Biotechnology) and RPA2 (NA19L, 1:500, Millipore, RRID: AB_565123). Cells were imaged using a Zeiss LSM510 confocal microscope or Keyence Fluorescence Microscope BZ-X710.