1. Department of Chemistry, University of Wisconsin-Eau Claire, Eau Claire, Wisconsin 54702-4004, United States
2. Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, United States
3. Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa 50011-3211, United States
4. J. Craig Venter Institute, 9704 Medical Center Drive, Rockville, Maryland 20850, United States
5. Université de Strasbourg, UMR 7156 CNRS, 67000 Strasbourg, France
6. Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, U.K.