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. 2022 Jan 23;17:204–220. doi: 10.1016/j.bioactmat.2022.01.023

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© 2022 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 6 — Ion extraction chromatogram of the peptide GAAGLPGPKGERGDAGPK (as an example) with and without MA groups in RCPhC1-MA 1 EQ. Panel (a) shows the total ion extraction chromatogram. Panel (b) shows the retention time (RT) and corresponding signal intensity of the unmodified peptide (red, RT 34.45 min) versus 1 lysine modification (blue, 61.75 min) and all lysines modified (green, 96.85 min). Panel (c) and Panel (d) show mass (m/z) with z = 3 and the corresponding signal intensity of the unmodified peptide (red, m/z 545.6256) versus all lysines modified (c, green, m/z 590.9792) and versus 1 lysine modification (d, blue m/z 568.3017), respectively. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)