1. Department of Medicine, Division of Allergy and Infectious Disease, Center for Emerging and Re-emerging Infectious Disease (CERID), University of Washington, Seattle, Washington 98109, United States
2. Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
3. Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
4. Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States