Fig. 6.

The two sets of generated data were affected differently as shown by the average CV as a function of reporter ion intensity. Oxidized cysteine percentages are calculated based on the oxidized cysteine reporter ion which is much prone to be affected by contamination by comparison with the more intense total cysteine reporter ion. The CVs for the oxidized fraction decrease with the reporter’s intensity, stabilizing under 30%, our limit of acceptance for a quantitative value