Affiliation: | † Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, National Institutes of Health, Bethesda, Maryland ‡ Laboratory of Molecular Biophysics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland § Laboratory of Cell Biophysics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland ¶ Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, Maryland |