IF-FISH was performed as previously described [50 (link), 58 (link)].
Fluorescent probe is Cy3-(TTAGGG)3 (Panagene). Primary antibodies include anti-53BP1 (Novus Biologicals), anti-RPA2 (EMD Millipore), anti-PCNA (Genetex), anti-PML (Santa Cruz), anti-SMARCAL1 (Santa Cruz), anti-SLX4 (Novus Biologicals), anti-pDNA-PKcs (S2056) (Abcam) and anti-Rad51 (Santa Cruz). Secondary antibodies include DyLight488 conjugated anti-rabbit (Multisciences), DyLight488 conjugated anti-mouse (Multisciences).
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