1. Laboratory of Biochemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
2. Division of Developmental Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
3. Division of Gene Expression and Regulation, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
4. Department of Agrobiological Resources, Faculty of Agriculture, Meijo University, Tempaku, Nagoya 468-8502, Japan