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. 2019 Dec 17;10:5762. doi: 10.1038/s41467-019-13775-1

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© The Author(s) 2019

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. 4 — Plots of I/I₀ against PFOS (left) and PFOA (right) concentrations in a, b HEPES buffer, c, d tap water, and e, f water of Mati Lake. I and I₀ are the intensities of fluorescence of the GC5A-6C•Fl (0.8/1.0 μM for a, b; 3.0/1.0 μM for c, d; and 10.0/1.0 μM for (e, f) reporter pair with and without the guest molecules, respectively. All experiments were performed at 25 °C, λ_ex = 500 nm, and λ_em = 513 nm. Error bars represent mean ± s.d. (n = 3 independent experiments).