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. 2017 May 3;7:1437. doi: 10.1038/s41598-017-01440-w

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© The Author(s) 2017

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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In situ fdGOGAT activity with different nitrogen sources. (A) In situ fdGOGAT activity of S. elongatus cultivated with nitrate (grey bars) or ammonium (white bars). Corresponding growth curves are shown on the right. Stationary cells were cultivated for 9 days to an OD₇₅₀ of 5.5 to 6.0. (B) fdGOGAT activity of S. elongatus cultivated with nitrate and after shift (s) into nitrogen free medium (t1-3) with corresponding growth curve on the right. Error bars: ±s.e.m., n = 4.