1. M. Wiedau-Pazos, J. J. Goto, E. B. Gralla, J. S. Valentine, Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
2. S. Rabizadeh, Interdepartmental Program for Neuroscience, University of California, Los Angeles, CA 90095, USA, and Program on Aging, La Jolla Cancer Research Foundation, La Jolla, CA 92037, USA.
3. J. A. Roe, Department of Chemistry and Biochemistry, Loyola Marymount University, Los Angeles, CA 90045, USA.
4. M. K. Lee, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA.
5. D. E. Bredesen, Program on Aging, La Jolla Cancer Research Foundation, La Jolla, CA 92037, USA.