1. Tama Biochemical Co. Ltd., 2-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 163-0704, Japan
2. Department of Biosciences, Teikyo University, Utsunomiya 320-8551, Japan
3. Department of the Science of Plant and Animal Production, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
4. The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan
5. Department of Chemistry, Joetsu University of Education, Joetsu-shi, Niigata 943-8512, Japan