1. Graduate School of Genome Science and Technology University of Tennessee Knoxville TN 37996 USA
2. Present address: Department of Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York NY 10029 USA
3. Department of Biochemistry and Cellular and Molecular Biology University of Tennessee Knoxville TN 37996 USA
4. Molecular Interaction Analysis Shared Resource St. Jude Children's Research Hospital Memphis TN 38105 USA
5. Department of Structural Biology St. Jude Children's Research Hospital Memphis TN 38105 USA
6. National Science Foundation Alexandria VA 22314 USA
7. Oak Ridge National Laboratory Oak Ridge TN 37830 USA