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. Author manuscript; available in PMC: 2021 Oct 7.
Published in final edited form as: J Am Soc Mass Spectrom. 2020 Sep 3;31(10):2143–2153. doi: 10.1021/jasms.0c00252

Figure 2.

Figure 2.

(A) CTD spectrum of the [M-2H]2− precursor of synthetic heparan sulfate tetramer standard GlcA-GlcNAc-GlcA2S-GlcNAc-O(CH2)5NH2. Molecular structure inset represents fragmentation seen from both CTD and EDD (black), CTD only (blue) and EDD only (red). (B) Fragment type distribution for glycosidic, cross-ring, glycosidic sulfate loss and cross-ring sulfate loss fragments are shown.