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(A) LC-MS/MS-MRM chromatograms for p-, m- and o-Tyr (m/z 182→136 transition) extracted from cells grown in the absence (left) and presence (right) of H2O2 and FeSO4. (B) Growth of E. coli pheT(G318W) strain relative to wild type in M9 minimal media supplemented with 0.1 mM FeSO4 and increasing concentrations of H2O2. Bars are the mean of three independent cultures, with errors bars representing ± SD.
