<i>Escherichia coli</i> (IMAGE) University of Tokyo Caption Asgard archaea containing schizorhodopsin cannot be cultured so Escherichia coli was used. Credit © 2020 IDKlab CC BY-SA 4.0 Usage Restrictions © 2020 IDKlab CC BY-SA 4.0 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.