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N-acetyl-l-cysteine (NAC) cotreatment rescues cells from erastin-induced ferroptosis. Representative phase contrast microscopy images of HO-1+/+ (A) and HO-1−/− (B) PTCs treated with either 0.1 or 1 μM erastin with or without 0.1 mM NAC (glutathione reducing agent) for 16 h.
