A plot of the peptide p -values versus delta mass revealed highly significant MS/MS fits to peptide sequences detected at delta mass values of −3, −2, −1, 0, +1, +2, +3, +4, and as high as +5 Da around the monoisotopic peak ( Figure 1 C and 1 G).
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Selected Ion Extraction of Peptides with Heavy Isotopes and Hydrogen Loss Reduces the Type II Error in Plasma Proteomics.
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