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ARTICLE
FRACTIONATION OF THE NUCLEUS BY DIVALENT CATIONS : Isolation of Nuclear Membranes
0.30.5 M MgCl2 was used to disassemble nuclei and to isolate by a single centrifugation in less than 3 hr a nuclear envelope fraction in 5560% yield as assessed by phospholipid recovery. Its gross chemical composition was determined and its morphology was studied electron microscopically by sectioning, freeze etching, and negative staining procedures.
Revised on June 5, 1972
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