1. Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
2. Center for the Physics of Living Cells, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
3. Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
4. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
5. Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT, USA