1. Department of Chemistry and the Center for Metalloenzyme Studies, University of Georgia, Athens, Georgia 30602, Laboratoire de Biochimie Végétale, Université de Neuchâtel, CH-2007 Neuchâtel, Switzerland, Chemistry Program, Roosevelt University, Chicago, Illinois 60605, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, and Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409