1. Kasha Laboratory, Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida 32306, Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, Evans Department of Clinical Research and Department of Medicine, Boston University School of Medicine, Boston University, Boston, Massachusetts 02118, and National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310