1. Department
of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10027, United States
2. Department
of Physics, University of Illinois at Urbana−Champaign, Champaign, Illinois 61801, United States
3. Center
for the Physics of Living Cells, Department of Physics, University of Illinois at Urbana−Champaign, Champaign, Illinois 61801, United States
4. Beckman
Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Champaign, Illinois 61801, United States
5. Howard
Hughes Medical Institute, Columbia University, New York, New York 10027, United States
6. Department
of Biological Sciences, Columbia University, New York, New York 10027, United States