How is mutant mitochondrial DNA clonally amplified? Much new evidence, still no answers.

Abstract excerpt

Twenty years have passed since Kadenbach and Müller-Höcker first proposed that the age-related accumulation of mutant mitochondrial DNA is caused by its clonal expansion, rather than by a "vicious cycle" of de novo mutational events caused by the disruptive metabolic impact of prior ones. Proof that they were correct emerged rapidly (though recognition of this was much slower); however, the mechanism underlying...

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