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. 2020 Sep 3;31(3):181–187. doi: 10.1093/glycob/cwaa085

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© The Author(s) 2020. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3 — Glycoproteomics analysis of the 320-VQPTESIVR-328 glycopeptide containing the putative glycosylation site at T325 and S325 derived from the RBD of the S1 spike SARS-CoV-2 glycoprotein. LC ES-MS (MS^e mode) data containing the [M + 2H]²⁺ molecular ion found at m/z 1171.02 and interpreted as a single Core 2 substitution at Thr 323 with the HexNAc₂Hex₂NeuAc₂ structure shown. “P” inside a circle corresponds to the peptide backbone of 320-VQPTESIVR-328. The insets correspond to zoom scan from the regions of (i) m/z 801, (ii) m/z 1004, (iii) m/z 474 and (iv) m/z 677.