Figure 10.

Electron detachment dissociation (EDD) of human milk oligosaccharide dianions. (A) EDD tandem mass spectrum of LST b as [M – H + Cl]^2–, along with (B) the corresponding fragmentation pattern. Product ions depicted in bold appeared uniquely for the chloride-adducted species and were not observed upon EDD of the doubly deprotonated analogue. Fragments resulting from multiple cleavage sites are designated with a slash. Reprinted with permission from ref (269). Copyright 2012 American Society for Mass Spectrometry.