1. Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
2. Department of Chemistry and Center for Metalloenzyme Studies, University of Georgia, Athens, Georgia 30602
3. Department of Physics, Emory University, Atlanta, Georgia 30322
4. Chemistry Department, Northwestern University, Evanston, Illinois 60208
5. Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424