1. Faculty of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda 669-1337, Japan, Kobe City University of Foreign Studies, Gakuen-Higashimachi, Nishi-ku, Kobe 651-2187, Japan, Department of Bioscience and Biotechnology, Ritsumeikan University, Nojihigashi, Kusatsu 525-8577, Japan, and Institute for Protein Research, Osaka University, Yamadaoka, Suita 565-0871, Japan