Alpha-Synuclein and Exemplar (IMAGE) University of Pennsylvania Caption The chemical structure of an alpha-synuclein fibril with an "exemplar" molecule, shown as colored spheres, bound to a previously identified binding site. Credit E. James Petersson Usage Restrictions Please include appropriate credit 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.