1. School of Physics, Peking University, Beijing 100871, China
2. Center for Theoretical Biological Physics, Rice University, Houston, Texas 77005, United States
3. Department of Chemistry, Rice University, Houston, Texas 77005, United States
4. Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
5. Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
6. Department of Cell Biology and Molecular Genetics, The University of Maryland, College Park, Maryland 20742, United States
7. Department of Bioengineering, Rice University, Houston, Texas 77005, United States
8. Department of Biosciences, Rice University, Houston, Texas 77005, United States