1. Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
2. Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
3. Department of Chemistry, Duke University, Durham, North Carolina, USA
4. Division of Pediatric Infectious Diseases, Department of Pediatrics, Duke University Medical Center, Durham, North Carolina, USA
5. UCB Biosciences, Bainbridge Island, Washington, USA
6. Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington, USA
7. Duke University NMR Center, Durham, North Carolina, USA