Ies). SEQUEST and X!Tandem were searched with a fragment ion mass tolerance of 0.80 Da and a parent ion tolerance of 10.0PPM. Iodoacetamide derivative of cysteine was specified as a fixed modification, whereas oxidation of methionine was specified as a variable modification. Results were merged using Scaffold (Proteome Software) version 3.0.8 which calculated False Discovery Rates (FDRs) using a r