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. 2018 Oct 5;8:14882. doi: 10.1038/s41598-018-33099-2

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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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Ammoniagenesis in response to altered pH. Initially, media was at a pH of 7.4, and was changed to 6.9 to determine differences in ammonia secretion between conditions. Ammonia concentration in effluent is shown in (A) the previous publication13, (B) HIM-31, and (C) Lonza RPTECs. Additionally, expression of select genes is shown in (D) HIM-31, and (E) Lonza RPTECs as log2fc relative to vehicle. (*Differentially expressed gene compared to vehicle, p < 0.05, 2-tailed t-test).