the Single-Celled <i>Paulinella</i> (IMAGE) Carnegie Institution for Science Caption This micrograph of the single-celled Paulinella shows the the photosynthetic "machinery" in green. Credit Eva Nowack 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.