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  • Title: Characterization of a butanol-acetone-producing Clostridium strain and identification of its solventogenic genes.
    Author: Chua TK, Liang DW, Qi C, Yang KL, He J.
    Journal: Bioresour Technol; 2013 May; 135():372-8. PubMed ID: 23069614.
    Abstract:
    A unique Clostridium species strain G117 was obtained in this study to be capable of producing dominant butanol from glucose. Butanol of 13.50 g/L was produced when culture G117 was fed with 60 g/L glucose, which is ~20% higher than previously reported butanol production by wild-type Clostridium acetobutylicum ATCC 824 under similar conditions. Strain G117 also distinguishes itself by generating negligible amount of ethanol, but producing butanol and acetone as biosolvent end-products. A butanol dehydrogenase gene (bdh gene) was identified in strain G117, which demonstrated a ~200-fold increase in transcription level measured by quantitative real-time PCR after 10h of culture growth. The high transcription suggests that this bdh gene could be a putative gene involved in butanol production. In all, Clostridium sp. strain G117 serves as a potential candidate for industrial biobutanol production while the absence of ethanol ensures an economic-efficient separation and purification of butanol.
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