1. Department of Biotechnology; Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
2. Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna-son Kunigami-gun Okinawa 904-0495 Japan
3. National Institute of Advanced Industrial Science and Technology (AIST); 2-4-7 Aomi Koto-ku Tokyo 135-0064 Japan