For siRNA transfection cells were plated at a density of 50–80% on 6-cm dishes 1 d before transfection. siRNAs were purchased from Dharmacon and were used at a final concentration of 20 nM. Transfection was carried out using the Lipofectamine RNAiMAX reagent (Invitrogen) according to the manufacturer’s instructions. Lentiviral vector plasmids for stable, constitutive or inducible expression of secreted luciferases GLuc and CLuc coupled to p53 or nontargeting control shRNAs were described previously29 (link). shRNA sequences from Open Biosystems are as follows: shFancD2.2 (V2LHS_139155), shFancD2.3 (V3LHS_383034), shFancD2.4 (V3LHS_383035). siRNA sequences: siFancD2.6 CAACATACCTCGACTCATT, siFancD2.8 GGAGATTGATGGT CTACTA, simTOR.8 GGCCAUAGCUAGCCUCAUA, simTOR.9 CAAAGGA CUUCGCCCAUAA, simTOR.10:GCAGAAUUGUCAAGGGAUA, simTOR.11 CCAAAGCACUACACUACAA.