Xylose and cellobiose fermentation to ethanol by the thermotolerant methylotrophic yeast
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چکیده
منابع مشابه
Metabolic engineering and classical selection of the methylotrophic thermotolerant yeast Hansenula polymorpha for improvement of high-temperature xylose alcoholic fermentation
BACKGROUND The methylotrophic yeast, Hansenula polymorpha is an industrially important microorganism, and belongs to the best studied yeast species with well-developed tools for molecular research. The complete genome sequence of the strain NCYC495 of H. polymorpha is publicly available. Some of the well-studied strains of H. polymorpha are known to ferment glucose, cellobiose and xylose to eth...
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BACKGROUND Cellobiose and xylose co-fermentation holds promise for efficiently producing biofuels from plant biomass. Cellobiose phosphorylase (CBP), an intracellular enzyme generally found in anaerobic bacteria, cleaves cellobiose to glucose and glucose-1-phosphate, providing energetic advantages under the anaerobic conditions required for large-scale biofuel production. However, the efficienc...
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In the absence of oxygen Bacillus macerans is able to ferment xylose. The principal products are ethanol, formate, C02, acetone and H2. The yield of ethanol was 61% based on the theoretical value of 0.51 g per g xylose consumed. The cells could grow in the presence of up to 4% (v/v) of added ethanol but the growth rate was already reduced to about 50% by 1% (v/v) of alcohol. Glucose and the pen...
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Eleven strains of an undescribed species of Clavispora fermented D-xylose directly to ethanol under aerobic conditions. Strain UWO(PS)83-877-1 was grown in a medium containing 2% D-xylose and 0.5% yeast extract, and the following results were obtained: ethanol yield coefficient (ethanol/D-xylose), 0.29 g g (57.4% of theoretical); cell yield coefficient (dry biomass/D-xylose), 0.25 g g; maximum ...
متن کاملEngineered Saccharomyces cerevisiae capable of simultaneous cellobiose and xylose fermentation.
The use of plant biomass for biofuel production will require efficient utilization of the sugars in lignocellulose, primarily glucose and xylose. However, strains of Saccharomyces cerevisiae presently used in bioethanol production ferment glucose but not xylose. Yeasts engineered to ferment xylose do so slowly, and cannot utilize xylose until glucose is completely consumed. To overcome these bo...
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ژورنال
عنوان ژورنال: FEMS Yeast Research
سال: 2003
ISSN: 1567-1356
DOI: 10.1016/s1567-1356(03)00146-6