1. Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
2. RIKEN
CLST-JEOL Collaboration Center, RIKEN, Yokohama, Kanagawa 230-0045, Japan
3. Biophysics
Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
4. JEOL RESONANCE, Inc., Musashino, Akishima, Tokyo 186-8558, Japan
5. Macromolecular
Science and Engineering, University of Michigan, 2300 Hayward Avenue, Ann Arbor, Michigan 48109, United States