Marion Jespersen in the lab (IMAGE) Max Planck Institute for Marine Microbiology Caption PhD-student Marion Jespersen works on a fermenter in which M. thermolithotrophicus grows exclusively on sulfate as sulfur source. Credit Tristan Wagner / Max Planck Institute for Marine Microbiology Usage Restrictions Only to be used in the context of this publication and citing the correct copyright. License Original 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.