1. Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo; 010-0810; Japan
2. Department of Biochemistry; Asahikawa Medical University; Asahikawa; 078-8510; Japan
3. Department of Molecular and Cellular Pharmacology; Faculty of Medicine; Gunma University Graduate School of Medicine; Maebashi; 371-8511; Japan
4. Laboratory of Molecular Cell Dynamics; Faculty of Advanced Life Science; Hokkaido University; Sapporo; 001-0021; Japan