UASt regulates expression of a catalytically dead and mitochondria-excluded/cytoplasmic version of the P{mito-APOBEC1} "mtDNA mutator" - codon GAA is changed to GCT at amino acid position 63 of the Rnor\Apobec1 cDNA, resulting in a Glu63Ala change, and the mitochondrial targeting sequence has been removed.
The expression of Rnor\Apobec1E63A.Tag:HA under the control of Scer\GAL4da.G32 leads to a small, progressive decrease in climbing ability, but does not significantly affect lifespan, as compared to controls.