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. 1980 Nov 25;8(22):5391–5410. doi: 10.1093/nar/8.22.5391

Intraspecific diversity of nucleotide sequences within the adenine + thymine-rich region of mitochondrial DNA molecules of Drosophila mauritiana, Drosophila melanogaster and Drosophila simulans.

C M Fauron, D R Wolstenholme
PMCID: PMC324309  PMID: 6258143

Abstract

Mitochondrial DNA (mtDNA) molecules from Drosophila mauritiana, D. melanogaster, and D. simulans contain a single adenine + thymine (A+T)-rich region, which is similarly located in all molecules, but varies in size among these species. Using agarose gel electrophoresis and electron microscopy, a difference in occurrence of one EcoRI site, and a difference in size (approximately 0.7 kb) of the A+T-rich regions was found between mtDNA molecules of flies of two female lines of D. mauritiana. In heteroduplexes constructed between these two kinds of mtDNA molecules, two or three regions of strand separation, each comprising single strands of unequal length, were apparent near the center of the A+T-rich region. Using the structural differences between D. mauritiana mtDNA molecules it was demonstrated the mtDNA of this species is maternally inherited. Differences in length of A+T-rich regions were also found between mtDNA molecules of two geographically separated strains of D. melanogaster, and between mtDNA molecules of two geographically separated strains of D. simulans. However, in both cases, in heteroduplexes constructed between mtDNA molecules of different strains of one species, the A+T-rich regions appeared completely paired.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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