Program in Biophysics, Stanford University, Stanford, California, USA. nizar.batada@utoronto.ca|Program in Biophysics, Stanford University, Stanford, California, USA. nizar.batada@utoronto.ca|Program in Biophysics, Stanford University, Stanford, California, USA. nizar.batada@utoronto.ca|Program in Biophysics, Stanford University, Stanford, California, USA. nizar.batada@utoronto.ca