1. Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
2. Nihon Waters K. K., Tokyo 140-0001, Japan
3. Molecular Neuroscience Research Center, Shiga University of Medical Sciences, Shiga 520-2192, Japan
4. Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Kagawa 761-0795, Japan