Protein shell (IMAGE) University of York Caption In a directed evolution experiment, a protein shell naturally occurring in bacteria evolved into a protein container that can encapsulate RNA, mimicking a genome packaging mechanism the team previously discovered in viruses Credit ETH Zürich / Stephan Tette Usage Restrictions The image may only be used with appropriate caption or credit.: ETH Zürich / Stephan Tette 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.