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Ethanol production using xylitol synthesis mutant of xylose-utilizing zymomonas

United States Patent

June 22, 2010
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
Production of ethanol using a strain of xylose-utilizing Zymomonas with a genetic modification of the glucose-fructose oxidoreductase gene was found to be improved due to greatly reduced production of xylitol, a detrimental by-product of xylose metabolism synthesized during fermentation.
Viitanen; Paul V. (West Chester, PA), McCutchen; Carol M. (Wilmington, DE), Emptage; Mark (Wilmington, DE), Caimi; Perry G. (Kennett Square, PA), Zhang; Min (Lakewood, CO), Chou; Yat-Chen (Lakewood, CO)
E. I. du Pont de Nemours and Company (Wilmington, DE), Alliance for Sustainable Energy LLC (Golden, CO)
11/ 862,736
September 27, 2007
STATEMENT OF GOVERNMENT RIGHTS This invention was made with United States government support under Contract Nos. 04-03-CA-70224 and DE-FC36-03GO13146 awarded by the Department of Energy. The government has certain rights in this invention.