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Tissue-culture Cell Fractionation. Fractionation of Membranes from Tissue-culture Cells Homogenized by Glycerol-induced Lysis

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Journal Biochem J
Specialty Biochemistry
Date 1979 Jul 15
PMID 496903
Citations 3
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Abstract

1. The disruption of various types of tissue-culture cells by (a) incubation in solutions of 1.2 M-glycerol and (b) transfer of the glycerol-loaded cells to relatively hypo-osmotic solutions of 0.25 M-sucrose was studied. 2. Bivalent cations (2mM-Mg2+) were generally included to preserve the nuclei, but some cells (polyoma-virus-transformed baby-hamster kidney cells) failed to be disrupted adequately under these conditions. 3. Other cells (mouse-embryo fibroblasts) required additional gentle Dounce homogenization to effect complete cell breakage. 4. Purification of the whole homogenate was carried out by a combination of differential centrifugation and sedimentation or flotation through sucrose gradients. 5. Enzyme analysis showed that plasma-membrane, endoplasmic-reticulum and mitochondrial fractions were obtained in good yield and purity.

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