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. Author manuscript; available in PMC: 2011 Jul 22.
Published in final edited form as: Anal Chem. 2009 Aug 1;81(15):6156–6164. doi: 10.1021/ac900627n

Figure 5.

Figure 5

(A) ECD+CID spectrum (upward) and ECD spectrum (downward) of [M+4H]4+ of melittin. The amino acid sequence for melittin at the bottom of the figure indicates the cleavage sites and is annotated the same as in Figure 2. (B and C) Expanded mass-to-charge regions around melittin [M+4H]3+• and [M+4H]2+, respectively, from 5A. The theoretical isotopic distributions expected if the charge states were formed directly from ESI are given for [M+3H]3+ and [M+2H]2+ ion the top spectra. The middle spectra are these mass-to-charge regions for the ECD+CID experiment and the bottom spectra are the same mass-to-charge regions for just the ECD spectra.