1. Bioscience
Division, Los Alamos National Laboratory, Los Alamos, New Mexico
87544, United States
2. Department
of Pharmacology and
Therapeutics, University of Florida, Gainesville,
Florida 32610, United States
3. Department of Biochemistry and
Molecular Biology, University of Florida, Gainesville, Florida 32610, United States
4. Center for Structural Molecular
Biology, Oak Ridge National Laboratory,
Oak Ridge, Tennessee 37831, United States