1. Department of Biochemistry and Molecular Biology; College of Medicine; University of Florida; Gainesville FL 32610 USA
2. Division of Biology and Soft Matter; Oak Ridge National Laboratory; Oak Ridge TN 37831 USA
3. Laboratory of Molecular Biology; National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health; Bethesda MD 20892 USA
4. Università degli Studi di Firenze; Polo Scientifico, Dipartimento Neurofaba, Sezione di Scienze Farmaceutiche e Nutraceutiche; Via Ugo Schiff 6 50019 Sesto Fiorentino, Firenze Italy
5. Department of Microbiology and Molecular Genetics; Oklahoma State University; Stillwater OK 74078 USA