Department of Mathematics, Florida State University, Tallahassee, Florida, United States of America.|Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, United States of America.|Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, United States of America.|Department of Chemistry and Biochemistry and Program in Molecular Biophysics, Florida State University, Tallahassee, Florida, United States of America.|Department of Mathematics and Programs in Neuroscience and Molecular Biophysics, Florida State University, Tallahassee, Florida, United States of America.