Restriction fragment analysis as a source of error in detection of heteroplasmic mtDNA mutations.

Abstract excerpt

The transition from A to G at nt 5656 (5656A-->G) in mitochondrial DNA has been suggested to be a pathogenic mutation and, furthermore, a heteroplasmic one. We found that the mutation was present in 14 out of 83 healthy controls from northern Finland and that 5656A-->G was exclusively associated with mtDNA haplogroup U. Interestingly, 5656A-->G appeared to be heteroplasmic in NheI digestion of PCR fragments that...

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