Table 2.
List of common mass shifts (observed on at least five sites) with possible explanations
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Carbamidomethylation (abbreviated as CAM) is added to cysteine side chains by treatment with iodoacetamide, but can be attached to other sites. Most of these modifications occur in vitro. Masses are computed as the average modification mass over FT spectra (except entries shown with an asterisk, which had no corresponding FT spectra).
