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. 2019 Oct 15;9:14822. doi: 10.1038/s41598-019-51428-x

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Low energy MS/MS spectra of selected human glycopeptides. (a) GSQWSDIEEFCNR –N4H5S2 glycopeptide (m/z 1278.1558) derived from DAF_HUMAN at 13 V (35% of the “standard” collision energy). (b) GHTLTLNFTR –N2H7 glycopeptide (m/z 900.7216) derived from LAMP1_HUMAN at 13.8 V (40% of the “standard” collision energy). Fragment intensities were enlarged by a factor of 5 for better visibility. (c) LLNINPNK –N4H5F glycopeptide (m/z 1347.5967) derived from LAMP1_HUMAN at 10.3 V (30% of the “standard” collision energy). (N: N-acetylhexosamine, H: hexose, S: sialic acid, F: fucose).