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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Proteomics. 2014 May;14(10):1195–1210. doi: 10.1002/pmic.201300432

Figure 4. Switch in modification from glutathionylation to cysteinylation in response to environmental conditions.

Figure 4

(A) Representative zero charge state spectra from top-down proteomics data showing switch in S-thiolation forms in the hypothetical protein YifE (STM14_4694). Fragmentation maps show the specific cysteine residue on which the switch occurs. (B) Estimated stoichiometry from intact protein mass spectra summed across the corresponding LC peak. Adapted from Ansong et al., 2013[35] with permission.