1. Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-50431;
2. Advanced Biosystems, George Mason University, Manassas, Virginia 201102;
3. Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida 32611-07003;
4. Department of Biology, Erskine College, Due West, South Carolina 296394; and
5. Department of Genetics and Biochemistry, Clemson University, Clemson, South Carolina 296345