1. Graduate Program in Molecular Biophysics, Kasha Laboratory, Florida State University, Tallahassee, Florida 32306, Department of Chemistry and Biochemistry and Center for Biological Structure and Organization, University of Maryland, College Park, Maryland 20742, Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, and National High Magnetic Field Laboratory, 1800 E Paul Dirac Drive, Tallahassee, Florida 32310