293 T, HeLa, BJ-hTERT and RPE1-hTERT cell lines were obtained from ATCC. RPE1-hTERT TP53-/- cells were a kind gift of D. Durocher71 (link). All cells were maintained in Dulbecco’s modified Eagle’s medium (DMEM) supplemented with 10% fetal calf serum (FCS, Sigma), 100 U ml−1 penicillin, 100 μg ml−1 streptomycin, and 2 mM L-Glutamine (Gibco, Life Technologies), at 37 °C in a humidified atmosphere with 5% CO2. All cell lines were routinely tested for mycoplasma contamination and scored negatively.
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