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Effects of supplementary butyrate on butanol production and the metabolic switch in Clostridium beijerinckii NCIMB 8052: genome-wide transcriptional analysis with RNA-Seq.
Biotechnol Biofuels
September 2013
Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Background: Butanol (n-butanol) has high values as a promising fuel source and chemical feedstock. Biobutanol is usually produced by the solventogenic clostridia through a typical biphasic (acidogenesis and solventogenesis phases) acetone-butanol-ethanol (ABE) fermentation process. It is well known that the acids produced in the acidogenic phase are significant and play important roles in the switch to solventogenesis.
View Article and Find Full Text PDF[Key enzymes in butanol fermentation by a facultative anaerobe Bacillus sp. TSH1].
Sheng Wu Gong Cheng Xue Bao
May 2013
Institute of Fine Chemical, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
Bacillus sp. TSH1 is a butanol-producing microorganism newly isolated in our laboratory; it can grow and ferment under facultative anaerobic conditions, while sharing similar fermentation pathways and products with Clostridium acetobutylicum. To illustrate the relationships between the products and the enzyme activities in Bacillus sp.
View Article and Find Full Text PDFTransport of substrates and metabolites and their effect on cell metabolism (in butyric-acid and methylotrophic fermentations).
Ann N Y Acad Sci
March 1988
Department of Chemical Engineering, Rice University, Houston, Texas 77251-1892.
The two components, delta pH and delta psi, of the membrane protonmotive force (delta p) effect and are affected by the transport of many substrates and metabolites. Because the integrity (or restoration) of the delta p requires the expenditure of metabolic energy, such transport processes affect the overall cell bioenergetics. However, the transport or high concentrations of certain substrates and metabolites can have more serious effects on cell metabolism because they partially or completely abolish either or both the delta pH and delta psi.
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