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. 2016 Jun 17;6:28276. doi: 10.1038/srep28276

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Analyses were performed after 24 hours of cellulose degradation. Panel (A) shows MS spectrum of sample with peaks corresponding to native and oxidized cello-oligosaccharides. Peaks that were further fragmented are indicated by arrows. Panel (B) shows MS/MS spectrum of the 687 m/z species which corresponds to a C4-oxidized product (ketone form). Panel (C) shows MS/MS spectrum of the 703 m/z species which corresponds to a double oxidized product (ketone form on C4 and aldonic acid form on C1). Observed fragments are depicted on structures in panel (D). Black stars: unassigned fragments.