Sensitivity of TAZ-KO cells to oxidants is rescued by DFO. The cells were seeded equally in 96-well plates and incubated for 3 h until they attached to the plate. 20 μm H2O2 (A) or 50 mm FeCl3 (B) was added, and the cells were incubated for the indicated times, after which cell viability was measured by MTT assay, as described under “Experimental Procedures.” C, TAZ-KO cells were either mock-treated (CTRL) or exposed to 200 μm DFO for 3 h prior to the addition of 20 μm H2O2. The data shown are means ± S.D. (n = 3). *, p < 0.05.