1. Department of Molecular Biology and Biochemistry; University of California, Irvine; Irvine CA 92697-3900 USA
2. Department of Chemistry; Graduate School of Science and Research Center for Materials Science; Nagoya University; Furo-cho, Chikusa-ku Nagoya 464-8602 Japan
3. Department of Chemistry; University of California, Irvine; Irvine CA 92697-2025 USA