E.coli With Proteorhodopsin (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption These movie frames show a tethered E.coli cell engineered to express the proteorhodopsin protein under red and green light. Credit Jan Liphardt and Jessica Walter 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.