The race to break down biomass (IMAGE) Iowa State University Caption In the race to break down cellulose, synthetic catalysts are now midway between two natural enzymes. Credit Illustration by Yan Zhao/Iowa State University. Usage Restrictions None License Original 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.