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Isolation of highly pure rat liver mitochondria with the aid of zone-electrophoresis in a free flow device (ZE-FFE). 2008

Hans Zischka, and Josef Lichtmannegger, and Nora Jägemann, and Luise Jennen, and Daniela Hamöller, and Evamaria Huber, and Axel Walch, and Karl H Summer, and Martin Göttlicher
GSF-National Research Center for Environment and Health, Neuherberg, Germany.

This protocol describes the purification of mitochondria from rat liver with the aid of zone electrophoresis in a free flow device (ZE-FFE). Starting from liver homogenate, cell debris and nuclei are removed by low speed centrifugation. A crude mitochondrial fraction is obtained by medium speed centrifugation and is further purified by washing followed by a Nycodenz gradient centrifugation. Lysosomes and microsomes are located at the upper parts of the gradient, whereas mitochondria are found in the medium part of the gradient. A subsequent purification step with ZE-FFE efficiently removes remaining lysosomes and microsomes and, importantly, damaged mitochondrial structures. The resulting purified mitochondria can be concentrated by centrifugation and used for further experiments. Finally, possible modifications of this protocol with respect to the isolation of pure lysosomes are discussed.

UI MeSH Term Description Entries
D008930 Mitochondria, Liver Mitochondria in hepatocytes. As in all mitochondria, there are an outer membrane and an inner membrane, together creating two separate mitochondrial compartments: the internal matrix space and a much narrower intermembrane space. In the liver mitochondrion, an estimated 67% of the total mitochondrial proteins is located in the matrix. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p343-4) Liver Mitochondria,Liver Mitochondrion,Mitochondrion, Liver
D002499 Centrifugation, Density Gradient Separation of particles according to density by employing a gradient of varying densities. At equilibrium each particle settles in the gradient at a point equal to its density. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Centrifugations, Density Gradient,Density Gradient Centrifugation,Density Gradient Centrifugations,Gradient Centrifugation, Density,Gradient Centrifugations, Density
D004586 Electrophoresis An electrochemical process in which macromolecules or colloidal particles with a net electric charge migrate in a solution under the influence of an electric current. Electrophoreses
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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