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. 2020 May 12;10:7896. doi: 10.1038/s41598-020-64135-9

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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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SPR sensorgrams obtained for CsgA N₂₂ peptide indicate binding to CsgG. Binding of the CsgA N22 peptide was assessed in the range of 20 − 1 nM concentrations using a non-activated flow cell as a control. The binding curves were fitted based on 1:1 binding model and the parameters calculated locally. Final value of the affinity constant obtained was 0.53 μM.