1. Department
of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
2. Department
of Biological Sciences, Northern Illinois University, DeKalb, Illinois 60115, United States
3. Research
School of Biology, Australian National University, Canberra, ACT
0200, Australia
4. Department
of Chemistry, Box H, Brown University, Providence, Rhode Island 02912, United States