Cover photograph (Copyright © 2006, American Society for Microbiology. All Rights Reserved.): Adenovirus type 5 E1B-55K in a juxtanuclear aggresome. A549 cells were transfected with an E1B-55K expression vector. E1B-55K stained with monoclonal antibody 2A6 is shown in green. DNA is stained with DAPI. (See related article in November 2005: vol. 79, no. 22, page 14004.)