1. Biological and Environmental Science Department, Samford University, Birmingham, Alabama 35229, United States
2. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588, United States
4. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States