G0 Cell Unit, Okinawa Institute of Science and Technology, Onna, Okinawa, Japan. pluskal@oist.jp|G0 Cell Unit, Okinawa Institute of Science and Technology, Onna, Okinawa, Japan. pluskal@oist.jp|G0 Cell Unit, Okinawa Institute of Science and Technology, Onna, Okinawa, Japan. pluskal@oist.jp|G0 Cell Unit, Okinawa Institute of Science and Technology, Onna, Okinawa, Japan. pluskal@oist.jp