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. 2018 May 30;8:8419. doi: 10.1038/s41598-018-26643-7

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© The Author(s) 2018

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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Saturation binding curves of LecA binding to common galactose terminated glycolipids and Gb3/LacCer mixtures that show positive cooperativity. The saturation binding curves’ dash lines represent the curve fits to Hill’s equation, fitted parameters are listed in SI Table 4. Data points are reported as mean ± S.D (n = 8). To better show the data points at low concentrations, the same binding curves on a semi-log scale are shown in the supplementary information. (a and b) Saturation binding curves of LecA binding to bilayers of common galactose terminated glycolipids. (c) Saturation binding curves of LecA binding to bilayers containing Gb3/LacCer mixtures. (d) ϕ values for 1 mol% of Gb3 mixed with different densities of LacCer. Dash line representing the fit of ϕ to the sigmoidal function is a guide to the eye.