Jan Karlseder, Salk Institute (IMAGE) Salk Institute Caption Jan is a Professor at the Molecular and Cell Biology Laboratory, and Donald and Darlene Shiley Chair. Credit Photo: Courtesy of the Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.