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. 1973 Feb;56(2):580-9.
doi: 10.1083/jcb.56.2.580.

Isolation and characterization of mitochondrial DNA from Drosophila melanogaster

M L Polan, S Friedman, J G Gall, W Gehring

Isolation and characterization of mitochondrial DNA from Drosophila melanogaster

M L Polan et al. J Cell Biol. 1973 Feb.

Abstract

Mitochondrial DNA (MtDNA) with a neutral buoyant density of 1.681 g/cm(3) has been isolated from unfertilized eggs of Drosophila melanogaster. This DNA is a circular molecule with an average length of 5.3 microm; it reassociates with a low C(0)t(1/2) after denaturation, and in alkaline isopycnic centrifugation it separates into strands differing in density by 0.005 g/cm(3). MtDNA isolated from purified mitochondria of unfertilized eggs or from total larval DNA melts with three distinct thermal transitions. The three melting temperature values suggest that the molecule may have three regions differing in average base composition. DNA isolated from unfertilized eggs of D. melanogaster contains approximately equal amounts of MtDNA and another DNA with a buoyant density of 1.697 g/cm(3), slightly less dense than main peak DNA. The possibility that the heavier DNA fraction consists of amplified ribosomal DNA was excluded by hybridization experiments, but otherwise nothing is known of its origin or function.

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References

    1. Proc Natl Acad Sci U S A. 1966 Dec;56(6):1836-43 - PubMed
    1. Proc Natl Acad Sci U S A. 1971 Dec;68(12):3145-9 - PubMed
    1. Biochemistry. 1971 Jul 6;10(14):2761-9 - PubMed
    1. Genetics. 1968 Oct;60(2):303-22 - PubMed
    1. Proc Natl Acad Sci U S A. 1968 Jun;60(2):553-60 - PubMed