1. Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
2. Graduate Institute of Life Science, National Defense Medical Center, Taipei 112, Taiwan
3. Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
4. Department of Microbiology, Tzu Chi University, Hualien 970, Taiwan
5. Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
6. Institute of Biochemical Sciences, National Taiwan University, Taipei 106, Taiwan