1. Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA.
2. Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA.
3. Department of Structural Biology, St. Jude Children’s Research Hospital, Memphis TN, 38105, USA.
4. St. Jude Graduate School of Biomedical Sciences, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA.
5. Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
6. Center for Pediatric Experimental Therapeutics, University of Tennessee Health Science Center, Memphis, TN 38163, USA.