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. 2021 Dec 3;12:7057. doi: 10.1038/s41467-021-27142-6

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© The Author(s) 2021

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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Fig. 2 — The MQ-C229 conjugates and intramolecular interactions are from the following crystal structures. a R273H-MQ (I), monomer A. b R273H-MQ (I), monomer C. c R273C-MQ (I), monomer A. d R273C-MQ (I), monomer C. MQ-C229 is located at the C-terminus of S7/S8 loop. Direct and water-mediated hydrogen bonds, and CH···O interactions are indicated by red and blue dotted lines, respectively. Van der Waals (VdW) interactions are in grey dotted lines. Water molecules shown as red spheres. Other structure representations and color codes are as in Fig. 1.