Author's Organization:Department of Applied Biochemistry, Faculty of Applied Biological Sciences, Hiroshima University Department of Applied Biochemistry, Faculty of Applied Biological Sciences, Hiroshima University Department of Applied Biochemistry, Faculty of Applied Biological Sciences, Hiroshima University Ube Research Laboratory, Ube Industries Ltd. Faculty of Liberal Arts, Shizuoka University Department of Bioresource Development, School of Bioresources, Hiroshima Prefectural University