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. 2021 Nov 24;11:22860. doi: 10.1038/s41598-021-02297-w

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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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Viral Spike protein RBD (PDB: 6M0J, orange-colored) is binding to glycated ACE2 receptor (blue). The tables on the right report the polar and the non-polar interactions in which the residues on the interface are involved. For the polar interactions, also the distance between the interacting atoms (measured in angstroms) is reported in the table. To get a better visual representation of the contacts, just the residues engaged in the polar interactions are labelled in the 3D image on the left, while all the non-polar interactions are omitted.