Cover photograph (Copyright © 2001, American Society for Microbiology. All rights reserved.): Subcellular localization of the reovirus NS protein and other reovirus proteins in L929 cells infected with reovirus type 3 Dearing at 24 h postinfection. Images were obtained using confocal immunofluorescence microscopy. The NS protein is colored green, and other reovirus proteins are colored red; colocalization of both proteins is indicated by the yellow color. Reovirus proteins are found throughout the cytoplasm of infected cells and also concentrate in discrete areas within the cytoplasm. The NS protein is found exclusively in inclusions of progeny virions, indicating that this nonstructural protein is found at sites of viral assembly. (See related article in the February 2001 issue: vol. 75, no. 2, p. 1459-1475.)