DNA mitochondrial polymerase exonuclease(IPR041336) is a member of the human mitochondrial DNA polymerase (Pol-γ). Pol-γ is composed of a catalytic subunit, Pol γ-A, which possesses both polymerase and proofreading exonuclease activities, and an auxiliary subunit, Pol gamma-B, which accelerates the polymerization rate and inhibits the exonuclease activity. This domain represents the exonuclease domain of the catalytic subunit Pol-A.