Mitochondrial genomes in a specific rat model differ at 100 nucleotides from a reference, which is more similar to human mitochondrial genetic diversity than that found in mice.

“the two mitochondria we're interested in instead of different only at five of these nucleotides or dna letters differ at 100 of them so that's much more similar to the kind of genetic diversity that you find in people's mitochondrial genomes rather than rats”