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Vertebrate cells carry two different genomes, nuclear (nDNA) and mitochondrial (mtDNA), both encoding proteins involved in oxidative phosphorylation. Because of the extensive interactions, adaptive coevolution of the two genomes must occur to ensure normal mitochondrial function. To investigate whether incompatibilities between these two genomes could contribute to interspecies reproductive barriers,...
Mitochondrial DNA diseases are relatively common, sometimes devastating, and transmitted exclusively through the egg to children of carrier mothers. A study in Cell by Wang et al. (2014) adds the exciting possibility of a new therapy for preventing mitochondrial disease transmission predicated on the use of polar body genomes in mice.
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