1. Department of Advanced Bioscience, Kindai University, 3327-204 Nakamachi, Nara 631-8505, Japan
2. Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8566, Japan, and
3. Department of Bioscience and Biotechnology, University of the Ryukyus, Okinawa 903-0213, Japan