1. Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
2. Department of Chemistry and Biochemistry, Spelman College, Atlanta, Georgia 30314-4399, United States
3. Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
4. Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
5. Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
6. Chemistry Department, Xavier University of Louisiana, New Orleans, Louisiana 70125, United States