1. Department of Physics, University of California, Berkeley, Berkeley, CA 94720, USA.
2. Department of Automation, Tsinghua University, Beijing 100084, China.
3. Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
4. Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA 94720, USA.
5. Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, Berkeley, CA 94720, USA.
6. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.