CLpump_uwm (IMAGE) University of Wisconsin - Milwaukee Caption Sunlight begins the process of energy generation in a marine bacterium when it jump-starts a pigment called "chloride-ion pumping rhodopsin" that moves the chloride ions (Cl-) unidirectionally into the cells. Scientists have been able to see this process for the first time, using an advanced imaging technique called time-resolved serial femtosecond crystallography, which produces molecular movies. Credit PNAS Usage Restrictions with credit 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.