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. 2019 Jun 20;9:8937. doi: 10.1038/s41598-019-45421-7

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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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Characteristic time-courses of fluorescence intensity of the OCP-TagGFP (A) and TagRFP-OCP (B) chimeras, measured after photoactivation of the OCP component by a 200 mW blue LED at different temperatures (as indicated by different line colors). (C) Relative contrast between the fluorescence intensity of OCP-TagGFP and TagRFP-OCP chimeras in photoactivated (F^R) and dark-adapted (F^O) states. Arrhenius plots of relaxation rates of OCP-TagGFP and TagRFP-OCP and corresponding energy barriers.