1. Institute for Advanced Core Technology, Suntory Ltd., 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Osaka 618-8503, Japan; Department of Bioenvironmental Science, Kyoto Gakuen University, Najo-ohtani 1-1, Sokabe-cho, Kameoka, Kyoto 621-8555, Japan; and Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-11, Sendai 980-8579, Japan