Graduate Group in Biophysics, University of California, San Francisco, San Francisco, California, USA. arjun.nufc@gmail.com|Graduate Group in Biophysics, University of California, San Francisco, San Francisco, California, USA. arjun.nufc@gmail.com|Graduate Group in Biophysics, University of California, San Francisco, San Francisco, California, USA. arjun.nufc@gmail.com|Graduate Group in Biophysics, University of California, San Francisco, San Francisco, California, USA. arjun.nufc@gmail.com