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. 2019 Jan 22;17(2):74. doi: 10.3390/md17020074

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Analysis of partially acetylated COS by reductive amine derivatization with mass spectrometry. The reaction product generated after ScCDA₂ treatment (GlcNAc)₄ was labelled with AMAC and analyzed by MALDI-TOF-MS. (A). MS1 spectrum of A3D1 labelled with AMAC (m/z 1005.96). (B). MS1 spectrum of A2D2 labelled with AMAC m/z 963.82). (C). MS1 spectrum of A1D3 labelled with AMAC (m/z 921.80).