1. Departments of Cell and Developmental Biology, Cancer Biology, Biostatistics, and Biochemistry, and The Proteomics Laboratory of the Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, McKusick-Nathans Institute of Genetic Medicine and the Departments of Biological Chemistry, Oncology and Pathology, Johns Hopkins University, Baltimore, Maryland 21205, Department of Cell Biology, Charles University, Prague, Czech Republic, and Institute of...