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- W4289968763 abstract "A method of preparation of mitochondria free of nuclear DNA and its fragments by treatment of mitochondria with DEAE-cellulose has been developed. This method is based on binding nuclear nucleic acids and nucleoproteins to DEAE-cellulose particles in the media used for isolation of mitochondria. Treatment with DEAE-cellulose under the conditions described does not induce any visible degradation of mitochondria and mitochondrial DNA. The mitochondrial DNA preparations obtained from beef and rat liver are represented with closed circular molecules of contour length about 5.5 mu. The 5-methylcytosine content in beef and rat mitochondrial DNA (3.03 and 2.0 mole %, respectively) is twice as much as in corresponding nuclear DNA. Besides, mitochondrial DNA strongly differs from nuclear ones by a lower degree of pyrimidine clustering: the amount of mono- and dipyrimidine fragments (about 32 mole %) in mitochondrial DNA is 1.5 times as large and the content of long pyrimidine clusters (hexa- and others) is 2--4 times as low as those in nuclear DNA. The methylation level and the pyrimidine clustering degree may be used as criteria for the purity of mitochondrial DNA from nuclear DNA." @default.
- W4289968763 created "2022-08-06" @default.
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- W4289968763 date "1976-01-01" @default.
- W4289968763 modified "2023-09-29" @default.
- W4289968763 title "[Isolation of mitochondrial DNA, purified of nuclear DNA, from animal tissues (degree of methylation and level of pyrimidine nucleotide clustering--criteria of purity)]." @default.
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