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. Author manuscript; available in PMC: 2020 Jun 21.
Published in final edited form as: Anal Chem. 2019 Sep 3;91(18):11932–11937. doi: 10.1021/acs.analchem.9b02736

Figure 3.

Figure 3.

MALDI-MS spectra of N-glycans (Na+ adduct) released from BTG: mdSUGAR labeled with periodate oxidation (A). High mannose (green label) and fucosylated (red label) N-glycans showed almost identical spectral profile prior to (B) and after (C) periodate oxidation due to lack of sialic acid. Highlighted acidic N-glycans (purple labels) showed mass loss before (D) and after (E) periodate oxidation. Mass shift of 62 Da was illustrated for each sialic acid after periodate oxidation. Star represents N-glycans as [M-H+2Na]+.