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. Author manuscript; available in PMC: 2013 Sep 25.
Published in final edited form as: Biochemistry. 2012 Sep 12;51(38):7488–7495. doi: 10.1021/bi300456f

Figure 4.

Figure 4

Precursor ion mass spectrum of the [M + 3]3+ ion (m/z 1063.4) of the Cys471-cysteic acid modified peptide residues (456–483) (1) and the [M + 3]3+ ion (m/z 1067.7) of the carboxymethyl cysteine (CMC)-modified peptide (456 – 483) (2).