Affiliation: | a Center for Structural Biology, Vanderbilt University, Nashville, TN 37212, USA;b Chemical and Physical Biology Program, Vanderbilt University, Nashville, TN 37212, USA;c Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA;d Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37212, USA |