1 School of Molecular Sciences, Arizona State University, Tempe, Arizona. Electronic address: Abhishek.Singharoy@asu.edu.
2 Department of Chemistry, University of Florida, Gainesville, Florida.
3 UMR 7019, Université de Lorraine, Laboratoire International Associé CNRS, Vandœuvre-lès-Nancy, France; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois.