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. 2021 Sep 7;122(8):7840–7908. doi: 10.1021/acs.chemrev.1c00380

Figure 11.

Figure 11

Electron transfer dissociation (ETD) of metal-ion-adducted human milk oligosaccharides. (A) ETD fragmentation pattern of reduced, permethylated LST c as [M + Mg]2+ (m/z 652.3). Note the diagnostic cross-ring fragments enabling the assignment of the LNnT core and the Neu5Ac linkage position. (B) Corresponding ETD tandem mass spectrum. Fragments between m/z 1142.2 and 1216.4 are attributed to cleavages within the sialic acid residue. Reprinted with permission from ref (257). Copyright 2011 American Society for Mass Spectrometry.