Several strains of arabinose-utilizing Zymomonas were engineered to express an arabinose-proton symporter which was found to provide the strains with improved ability to utilize arabinose. These strains have improved ethanol production in media containing arabinose, either as the sole carbon source or as one sugar in a mixture of sugars.
STATEMENT OF GOVERNMENT RIGHTS
 This invention was made with United States Government support under Contract No. DE-FC36-07G017056 awarded by the Department of Energy. The U.S. Government has certain rights in this invention.