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. 2022 Apr 15;13:775186. doi: 10.3389/fmicb.2022.775186

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Copyright © 2022 Schwedler, Grzeski, Kappert, Rust, Heymann, Hoppe and Blanchard.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Profiles of COVID-19-related glycosylation alterations in (A) total IgG₁, (B) anti-S IgG₁, and (C) total IgG₂. *p < 0.05, **p < 0.01. The calculation of the glycosylation traits Gal, Bisec, Sial, and Fuc is given in section “MALDI-TOF Measurements and Data Analysis.”