1. Chemical Biology & Therapeutics Department, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105
2. Department of Chemistry and Biochemistry, San Francisco State University, San Francisco, California 94132-4163
3. Department of Biochemistry and Biophysics
4. Department of Cellular and Molecular Pharmacology
5. Department of Chemistry, Washington State University, Pullman, Washington 99164-4630