1. A. M. Chinnaiyan, K. O'Rourke, M. Garg, V. M. Dixit, Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
2. G.-L. Yu, D. R. Duan, L. Xing, R. Gentz, J. Ni, Human Genome Sciences Inc., 9620 Medical Center Drive, Suite 300, Rockville, MD 20850-3338, USA.
3. R. H. Lyons, Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA.