Affiliation: | .Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061 USA ;.Department of Plant Sciences, University of Arizona, Tucson, Arizona 85721 USA ;.Department of Plant Pathology, Washington State University, Pullman, Washington 99164 USA ;.Current address: Department of Internal Medicine, Division of Oncology, and The Genome Institute, Washington University School of Medicine, St. Louis, MO 63110 USA |