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Expression and activation status of early DNA damage effectors according to STAT1. Levels of expression and phosphorylation of ATM, ATR, and CHK1 (A) or CHK2 (B) after 1 hr treatment or not (NT) with 10 μM MNNG were analysed by western blotting at the indicated times. The membranes were subsequently probed with anti‐phosphorylated forms and anti‐total forms antibodies. Typical blots out of three experiments are shown. STAT1+/+ and STAT1−/− panels are cut from the same western blot.
