1. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
3. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
4. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
5. Molecular and Cellular Biology: Biochemistry, University of California, Berkeley, Berkeley, California 94720, United States
6. Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
7. Research Center for Future Earth, National Taiwan University, Taipei 10617, Taiwan