Bacterial Biofilm (image) University of California - Berkeley Caption This is a 3-D reconstruction of the bacterial biofilm made by cholera bacteria. Bacterial cells (blue) attach to surfaces with a glue-like protein (green) and cement themselves together with another protein (gray). The bacterial clusters then cover themselves with a protective shell (red) made of proteins and sugar molecules. Credit Yeysel Berk, UC Berkeley Usage Restrictions None 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.