Table S2. Oxidation status of cysteine containing peptides of non-stressed yeast cells.  MS1 ion chromatograms were extracted using Skyline (v.2.5.0). Integrated peak areas of the “heavy” (13C-ICAT labelled) and “light” (12C-ICAT labelled) version of the peptide ions were exported and the proportion of reversibly oxidized (12C-ICAT labelled) cysteine residues (%oxidation) was calculated.  The table contains all cysteine containing peptide sequences quantified in Skyline in at least two of three biological replicates.