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. 2015 Apr 24;5(2):211–231. doi: 10.3390/metabo5020211

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Putrescine production (black bar) and N-acetylputrescine byproduct (grey bar) in PUT21-derived strains carrying proB with different translational start codons. Cells were grown in CGXII medium with 20 g·L⁻¹ glucose and plasmid encoded genes were induced with 1 mM IPTG. Means and standard error of three independent experiments are shown.