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. 2018 Nov 1;8:16207. doi: 10.1038/s41598-018-34373-z

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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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Alternative accesses of water molecules into the PXR cavity. On the left: the solvent-accessible volumes found during the simulation are represented as a solid blue surface; the two entrance channels are indicated by arrows. On the right: focus on the two entrances (top: B, bottom: A) with sidechains of the residues responsible for gate opening and water entrance represented as sticks.