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  • Title: Studies on the biosynthesis of mitochondrial malate dehydrogenase and the location of its synthesis in the liver cell of the rat.
    Author: Bingham RW, Campbell PN.
    Journal: Biochem J; 1972 Jan; 126(1):211-5. PubMed ID: 5075231.
    Abstract:
    A method is described for the isolation of mitochondrial malate dehydrogenase from either the whole tissue homogenate or from the microsomal fraction of rat liver. The procedure involves the treatment of the tissue extract with detergent followed by gel filtration and chromatography on Amberlite CG-50 and DEAE-cellulose. The resulting enzyme was homogeneous by the criterion of gel electrophoresis. Incubation of the microsomal fraction from rat liver under the usual conditions for protein synthesis in the presence of [(3)H]leucine resulted in the incorporation of (3)H into the mitochondrial malate dehydrogenase when purified as described. The results are taken to indicate that the mitochondrial enzyme is synthesized by the cytoplasmic ribosomes. Possible ways in which the cytoplasmic and mitochondrial forms of malate dehydrogenase reach their final locations in the cell are discussed.
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