Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to neuropathy, ataxia, and retinitis pigmentosa ?
    ### Response:
    NARP results from mutations in the MT-ATP6 gene. This gene is contained in mitochondrial DNA, also known as mtDNA. Mitochondria are structures within cells that convert the energy from food into a form that cells can use. Although most DNA is packaged in chromosomes within the nucleus, mitochondria also have a small amount of their own DNA.
    