Cover photograph (Copyright © 2004, American Society for Microbiology. All Rights Reserved.): The capsid structure of a gammaherpesvirus, rhesus monkey rhadinovirus (RRV), was determined at 15-Å resolution by electron cryomicroscopy and is shown as a shaded surface representation colored according to particle radius (bottom). A portion of the front map is removed to reveal the viral DNA density (red). A hexon is enlarged to show its protein interactions and its open channel (top left). An enlarged side view of a region containing a triplex and its associated penton subunit (major capsid protein) is shown at the top right. Designed by Z. Hong Zhou. (See related articles in December 2003: vol. 77, issue 24, p. 13182 and 13439.)