Fluorescing Algae (IMAGE) Ruhr-University Bochum Caption This is a fluorescence micrograph of Chlamydomonas reinhardtii. The nucleus of the algae is marked by a green fluorescent protein, the chloroplasts fluoresce red. Credit General and Molecular Botany, RUB 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.