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Caption : supplementary figure 1: reproducibility in the tic (total ion chromatogram) of three
technical replicates of both control and cysteine treated cells used in swath-ms analysis.


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Caption : supplementary figure 2a: inconsistency in retention time for any fragment ion across different runs; 2b: nonspecific xic ion interference for any specific peptide quantitation;
2c: comparison of xics ion intensity ratio with ion intensity ratios obtained from fragment    ion  library for any specific peptide;2d: representative xics for a particular peptde which has been included in the study.


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Caption : supplementary figure 3: itraq labelling for different experiments