Cyanobacterium Showing Cellulose (IMAGE) University of Texas at Austin Caption A photosynthetic cyanobacterium with chlorophyll (red) and the cellulose material (blue) it produced. Credit Brown and Nobles, the University of Texas at Austin 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.