1. Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
2. Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota 55391, United States
3. Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
4. Department of Physics, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
5. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan
6. RIKEN SPring-8 Center, RIKEN, Sayo, Hyogo 679-5148, Japan
7. Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
8. Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States