1. Department of Chemistry, University of Georgia, Athens, Georgia 30602 United States
2. Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
3. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6475, United States
4. Tennessee Wesleyan University, Athens, Tennessee 37303, United States
5. Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M17DN, U.K.