Single muscle fiber analysis in patients with 3243 mutation in mitochondrial DNA: comparison with the phenotype and the proportion of mutant genome.

Abstract excerpt

An A-to-G point mutation at nucleotide pair (np) 3243 (3243 mutation) in mitochondrial DNA (mtDNA) is a well-known pathogenic mutation, which has been found in approximately 80% of patients with mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes (MELAS). It has been reported that the 3243 mutation also occurs in individuals with non-MELAS phenotypes. The reasons for the phenotypic...

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