1. Institute of Biological Chemistry, Academia Sinica , Taipei 11529 , Taiwan
2. Institute of Biochemical Sciences, National Taiwan University , Taipei 10617 , Taiwan
3. Life Science Group, Scientific Research Division, National Synchrotron Radiation Research Center , Hsinchu 30076 , Taiwan
4. Department of Physics, National Central University , Zhongli 320317 , Taiwan
5. Department of Chemistry, National Tsing Hua University , Hsinchu 300044 , Taiwan
6. Neuroscience Program of Academia Sinica , Taipei 11529 , Taiwan