Cover photograph (Copyright © 2004, American Society for Microbiology. All Rights Reserved.): Adenovirus-microtubule interaction in vitro. Microtubule-associated proteins enhance the interaction of Cy3 fluorophore-conjugated adenovirus (red) with fluorescein-conjugated microtubules (green) in vitro. The binding assay was used to demonstrate the importance of the cytoplasmic dynein molecular motor in mediating the adenovirus-microtubule interaction. (See related article on page 10122.)