Spherical Capsid (image) Rice University Caption High-energy X-ray diffraction was used to pinpoint some 5 million atoms in the protective protein coat used by hundreds of viruses. Credit J. Pan & Y.J. Tao/Rice University Usage Restrictions Must credit: J. Pan & Y.J. Tao/Rice University 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.