1. Dynamics
of Macromolecular Assembly Section, Laboratory of Cellular Imaging
and Macromolecular Biophysics, National Institute of Biomedical Imaging
and Bioengineering, National Institutes of Health, Bethesda, Maryland 20892, United States
2. Laboratory
of Cellular and Molecular Neurophysiology, Porter Neuroscience Research
Center, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, United States