Molecular Biology and Evolution 19:2261-2264 (2002)
© 2002 Society for Molecular Biology and Evolution
Heteroplasmy and Evidence for Recombination in the Mitochondrial Control Region of the Flatfish Platichthys flesus
*Department of Marine Biology, Centre for Ecological and Evolutionary Studies, University of Groningen;
Laboratoire Biologie Cellulaire 4, Université Paris-Sud
The general assumption that mitochondrial DNA (mtDNA) does not undergo recombination has been challenged recently in invertebrates. Here we present the first direct evidence for recombination in the mtDNA of a vertebrate, the flounder Platichthys flesus. The control region in the mtDNA of this flatfish is characterized by the presence of a variable number of tandem repeats and a high level of heteroplasmy. Two types of repeats were recognized, differing by two C-T point mutations. Most individuals carry a pure "C" or a pure "T" array, but one individual showed a compound "CT" array. Such a compound array is evidence for recombination in the mtDNA control region from the flounder.
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