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