1. Bredesen Center for Interdisciplinary Research, University of Tennessee, Knoxville, Tennessee 37996, United States
2. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
3. Center for Nanophase Materials, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
4. Bioscience Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
5. Department of Biochemistry and Molecular Biology and Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, United States