1. Laboratory of Molecular Life Sciences, Department of Biotechnology, Akita Prefectural University, Akita 010-0195, Japan
2. Department of Veterinary Anatomy, College of Bioresource Sciences, Nihon University, Fujisawa 252-0880, Japan
3. Department of Microscopic Anatomy and Cell Biology, Asahikawa Medical University, Asahikawa 078-8510, Japan
4. Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi 371-8512, Japan