Lignin (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The lignin in plant cell walls that helps protect energy-storing sugars must be degraded for the cost-effective production of biofuels. Credit Image courtesy of DOE Office of Science 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.