(IMAGE) University of Vienna Caption This is an atomistic model of the protein villin headpiece. Color and the size of ellipsoids capture the local dynamics of individual atoms. Credit Copyright: Bojan Zagrovic Usage Restrictions The image may only be used with appropriate caption or 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.