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. 2021 Nov 6;16(4):958–971. doi: 10.1038/s41396-021-01144-0

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© The Author(s) 2021

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. 1 — a Ammonium consumption and b nitrate production in the presence of 350 μM NH₄⁺ with and without the addition of 100 μΜ 1,7OD or ATU. c Nitrite consumption and d nitrate production in the presence of 20 μM NO₂^- with and without the addition of 100 μΜ 1,7OD or ATU. Concentrations of the substrates ammonium (a) and nitrite (c) are indicated by solid, produced nitrate (b, d) by open symbols. Data points represent the mean of technical triplicates, error bars the standard deviations between three biological replicates.