Abstract
Eukaryotic organelles or subcellular compartments can be selectively isolated based on their physical density and their stability in the presence of nonionic detergents. This chapter describes a protocol for the preparation of cytoplasm, nucleoplasm, and chromatin, in addition to isolation of RNA and proteins from these fractions. Proteins and protein complexes stably associated with chromatin and other high molecular weight nuclear components can be extracted under non-denaturing conditions by enzymatic digestion of RNA and DNA. The chapter also includes a detailed extraction protocol from highly purified nuclei.
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