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The age-dependent accumulation of point mutations in the control region of human mtDNA has been suggested to contribute to aging processes. We investigated whether mtDNA point mutations accumulate to detectable levels in this region of mtDNA from aged Fischer 344 X Brown Norway F 1 hybrid rats. The control region and a portion of the major arc region (nucleotides 4386–7707) of the mtDNA were...
This study analyzed the incidence of point mutations in mitochondrial DNA of brain and muscle tissues from young (6-month) and old (24-month) male F344 rats. Coding sequence mutations in subunit 5 of the NADH dehydrogenase gene were detected after high-fidelity PCR amplification and cloning by denaturing gradient gel electrophoresis (DGGE) assay followed by sequencing of detected mutants. In total,...
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