Jens Karlsson, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Jens Karlsson, Ph.D. student at the Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet. Credit Francesco Righetti 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.