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. 2020 Jun 16;11:1318. doi: 10.3389/fmicb.2020.01318

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Copyright © 2020 Zeng, Yau, Lin, Xia, Yang, Wang, Song and Wang.

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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Overlaid extracted compound chromatograms (ECCs) of identified HA1 glycopeptides containing the glycosylation site at position 158. HA1 proteins extracted from influenza were digested with chymotrypsin at 25°C for 16 h, followed by profiling the glycopeptides by C18 chip-Q-TOF-MS. The glycoforms at position 158 were then identified based on high-resolution MS data. (A): 4_3_1_0, (B): 3_6_2_0, (C): 5_6_0_1, (D): 4_3_1_2 (SO3), (E): 3_3_0_1, (F): 7_5_2_0 (SO3), (G): 4_4_3_0, (H): 3_6_2_1 (SO3), (I): 6_7_0_0 (SO3), (J): 3_7_0_2.