1. Section
on Physical Biochemistry, Laboratory of Biochemistry and Genetics,
National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
2. Section
on Dynamics of Macromolecular of Assembly, Laboratory of Cellular
Imaging and Macromolecular Biophysics, National Institute of Biomedical
Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland 20892, United States
3. Department
of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States