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A hypothetical schematic showing the dissociation scheme of the mixed L/D [14Pro+2H]2+ cluster. The residue evaporation and ion fission regions of the fragmentation process are labeled. Cluster ion compositions are designated by the numbers of L- and D- proline residues as “L/D”. Composition degeneracies are not designated (see text for details). Circled compositions represent preferred fragmentation pathways (see preferred fragments in Figures 4 and 5).
