1. Department of Chemistry, Wichita State University, Wichita, Kansas 67260, United States
2. Department of Diagnostic Medicine & Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506, United States
3. Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa 52242, United States
4. Protein Structure Laboratory, The University of Kansas, Lawrence, Kansas 66047, United States
5. NYX, New York Structural Biology Center, Upton, New York 11973, United States