Yeast (IMAGE) DOE/Oak Ridge National Laboratory Caption A yeast engineered by Mascoma and BESC could hold the key to accelerating the production of ethanol in the US Credit Courtesy of Mascoma Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.