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. 2020 Aug 14;11:1826. doi: 10.3389/fmicb.2020.01826

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Copyright © 2020 Hailemariam, Zhao and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Time course determination of enzyme activity and soluble microbial crude protein production (MCP) in S. dextrinosolvens Z6 grown on different nitrogen sources. The bars represent averages for triplicate cultures used to measure enzyme activity. Error bars represent standard deviations. (A) Urease activity. (B) Glutamate dehydrogenase (GDH) activity. (C) Glutamine synthetase (GS) activity. (D) Glutamate synthase (GOGAT) activity. (E) Soluble microbial crude protein. The data points represent early, mid, and late exponential growth phases. Bars with different letters are significantly different.