1. Department of Molecular and Cellular Biology, University of California, Davis. Davis, CA 95616, USA.
2. Department of Anatomy and Structural Biology and Gruss Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
3. Department of Biology, Faculty of Science, Tohoku University, Sendai, 980-8578 Miyagi, Japan.
4. Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, 980-0845 Miyagi, Japan.
5. N Molecular Systems Inc., Palo Alto, CA 94303, USA.