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Received December 16, 2010
Accepted February 12, 2011
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effects of carbon source and metabolic engineering on butyrate production in Escherichia coli

Department of Chemical & Biological Engineering, Korea University, Seoul 136-713, Korea 1Clean Energy Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
mkoh@korea.ac.kr
Korean Journal of Chemical Engineering, July 2011, 28(7), 1587-1592(6), 10.1007/s11814-011-0032-6
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Abstract

Butyrate was produced in recombinant Escherichia coli strains by applying metabolic engineering strategies. The genes for producing butyrate were cloned from Clostridium acetobutylicum and then expressed in E. coli. To study important factors for improving the productivity of butyrate, we deleted pta and ptsG genes in E. coli and compared the effects of these gene deletions in E. coli B and K strains. The effect of carbon sources, glucose and glycerol, was also compared. A significant improvement of butyrate production was made when glycerol was used as a carbon source, resulting in 0.56 g/l of butyrate in LB medium with 1% (v/v) glycerol.

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