1. UT/ORNL
Joint Institute of Biological Sciences, University of Tennessee, Knoxville, Tennessee 37996, United States
2. ISIS
Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot, OX11 0QX, U.K.
3. Large-Scale
Structures Group, Institut Laue Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
4. Laboratory
of Chemical Physics, National Institute of Diabetes and Digestive
and Kidney Diseases, National Institutes of Health, DHHS, Bethesda, Maryland 20892-0520, United States
5. Departments
of Chemistry and Biology, Georgia State University, Atlanta, Georgia 30302, United States
6. Biology and
Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States