1. Hauptman-Woodward Medical Research Institute, 700 Ellicott Street, Buffalo, New York 14203, United States
2. Department of Structural Biology, SUNY at Buffalo, 700 Ellicott Street, Buffalo, New
York 14203, United States
3. W. M. Keck Foundation Biotechnology Resource Laboratory, Yale University, New Haven, Connecticut 06511, United
States
4. National Magnetic
Resonance Facility at Madison, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
5. Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States