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. 2020 Jun 4;10:9117. doi: 10.1038/s41598-020-65688-5

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© The Author(s) 2020

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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Helical wheel projections and three-dimensional structure simulation of PA-13 depicted in ribbon diagrams. Positively charged residues are presented in blue, hydrophobic residues are shown in yellow below the wheel and aromatic residues are shown in green. The numbers represented the position of amino acid residues.