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. 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.