1. National Human Genome Research Institute
2. National Institutes of Health, Bethesda, Maryland 20892; National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702
3. Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
4. National Cancer Institute
5. Department of Biochemistry, University of California San Francisco, San Francisco, California 94143
6. Department of Microbiology, University of Umea, Umea S 901 87, Sweden
7. Vanderbilt University Medical Center, Nashville, Tennessee 37232
8. National Institute of Diabetes and Digestive and Kidney Diseases