1 Department of Physics, Lomonosov Moscow State University, Moscow 119992, Russia.
2 Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences, Moscow MSC-3700, Russia.
3 Cell Biology and Biophysics Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892; Antonina@mail.nih.gov.
4 Biochemistry and Biophysics Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892.