Abstract
Enrichment of desired mitochondrial DNA (mtDNA) haplotypes, in both experimental systems and the clinic, is an end sought by many. Through use of a designer nuclease platform optimized for delivery to mitochondria-the mitochondrially targeted zinc finger-nuclease (mtZFN)-it is possible to discriminate between mtDNA haplotypes with specificity to the order of a single nucleotide substitution. Site-specific cleavage of DNA produces a shift in the heteroplasmic ratio in favor of the untargeted haplotype. Here, we describe protocols for assembly of paired, conventional tail-tail mtZFN constructs and experimental approaches to assess mtZFN activity in mammalian cell cultures.
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