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. 2020 Jan 6;204(4):1022–1034. doi: 10.4049/jimmunol.1901145

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Copyright © 2020 The Authors

This article is distributed under the terms of the CC BY 4.0 Unported license.

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FIGURE 10. — MALDI-TOF MS profiles of permethylated N-glycans from the N297A/C575A (Asn-563) (A), N563A/C575A (Asn-297) (B), and D221N/N297A/N563A/C575A (Asn-221) (C) Fc glycan mutants expressed in HEK 293-F cells. Linkage-determined monosaccharides are positioned above the bracket on a structure. Poly-hexose contaminants are highlighted with crosses. The data were acquired in the positive ion mode to observe [M⁺Na]⁺ molecular ions. All the structures are based on composition and knowledge of N-glycan biosynthetic pathways. Structures shown outside a bracket have not had their antenna location unequivocally defined.