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Figure 6. Precursor mass of 1029. 1143 (3+) (A), CID-MS2 of the precursor (B), and ETD-MS2 of the precursor (C) for the disulfide-linked peptide (Cys22-Cys96). For ETD-MS2, a different charge of the precursor ion, 772.59 (4+), was used for fragmentation.
