1. Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
2. Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA.
3. Department of Physics, Lehigh University, Bethlehem, PA 18015, USA.
4. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
5. Department of Cell Biology, Yale University, New Haven, CT 06520, USA.