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. 2019 Dec 3;10:2784. doi: 10.3389/fmicb.2019.02784

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Copyright © 2019 Qian, Zhong, Sun, Sun, Zhang, Liu, Qu and Zhong.

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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Cellulase and protease production by T. reesei during cultivation in CPM containing different nitrogen sources: 0.5% (w/v) (NH4)₂SO₄ (open cycle) or 2.0% corn steep liquor (CSL, filled square). (A) The extracellular protein produced by T. reesei was examined. (B) The total cellulase activities (FPA) were assayed. (C) Time course analysis of the protease activity levels during cultivation in the CPM media containing different nitrogen sources: 0.5% (w/v) (NH4)₂SO₄ (open cycle) or 2.0% corn steep liquor (CSL, filled square). Data are the means of three independent experiments; error bars show standard deviations.