Cover photograph (Copyright © 2000, American Society for Microbiology. All rights reserved.): Localization of the nuclear export factor NXT1 (pink) at the nuclear pore complex in HeLa cells. The cells were counterstained with DAPI (blue) to reveal nuclei within the field. (Photo courtesy of Lyne Lévesque and Bryce Paschal, University of Virginia Health Sciences Center, Charlottesville.) (See related article in the December 1999 issue: vol. 19, p. 8616.)