1. Labeling Chemistry Team, Division of Bio-Function Dynamics Imaging; RIKEN Center for Life Science Technologies, CLST; 6-7-3 Minatojima, minamimachi, Chuo-ku Kobe Hyogo 650-0047 Japan
2. Graduate School of Life and Environmental Science; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku Sakai Osaka 599-8531 Japan
3. Cellular Function Imaging Team, Division of Bio-function Dynamics Imaging; RIKEN Center for Life Science Technologies, CLST; 6-7-3, Minatojima minamimachi, Chuo-ku Kobe Hyogo 650-0047 Japan