1. Department
of Biochemistry and Molecular Biology, Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
2. Biomolecular
NMR Core Facility, Biological Sciences Division, The University of Chicago, Chicago, Illinois 60637, United States
3. Center
for Biophysics and Computational Biology, Department of Biochemistry,
College of Medicine, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States