Relationship of genotype to phenotype in fibroblast-derived transmitochondrial cell lines carrying the 3243 mutation associated with the MELAS encephalomyopathy: shift towards mutant genotype and role of mtDNA copy number.

Abstract excerpt

Transmitochondrial cell lines were isolated by fusing mtDNA-less rho degrees 206 cells with enucleated fibroblasts derived from four members of a pedigree carrying in their muscle varying proportions of the mutation at position 3243 in the tRNA(Leu(UUR)) gene associated with the MELAS encephalomyopathy. The mitochondrial transformants derived from an asymptomatic individual were all homoplasmic for wild-type...

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