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. 2017 Jun 6;409(19):4483–4505. doi: 10.1007/s00216-017-0406-7

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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Schematic representation showing mechanism of glycan release from proteins of A N-glycans by PNGase F and optional ¹⁸O-labeling [22] and of B O-glycans by reductive β-elimination and optional BEMAD [23]