Pumping Iron (image) University of North Carolina at Chapel Hill Share Print E-Mail Caption The diatom Pseudo-nitzschia granii isolated from the North Pacific Ocean that contains the protein proteorhodopsin, which helps these regulators of climate change survive. Each cell is about 60 microns in length and 3 microns in width. Credit Adrian Marchetti Usage Restrictions None Share Print E-Mail 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.