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. 2016 Jan 19;17:68. doi: 10.1186/s12864-016-2382-2

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© Sun et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Anaerobic growth (OD₆₀₀) of B. licheniformis LMG 6934 in TSB (a) and nitrate, nitrite and N₂O concentrations (mM)(b) over time. Error bars show standard deviation (n = 3). Different growth phases based on primary metabolism in TSB amended with nitrate are marked: μ₁, respiratory growth with nitrate as electron acceptor; μ₂, fermentative growth after nitrate is depleted; μ₃, sporulation. Dashed curve visualizes N deficit caused by the lack of ammonium data