Progressive External Ophthalmoplegia with Mitochondrial Dna Deletions, Autosomal Recessive 5, is also known as peob5. An important gene associated with Progressive External Ophthalmoplegia with Mitochondrial Dna Deletions, Autosomal Recessive 5 is TOP3A (DNA Topoisomerase III Alpha). Affiliated tissues include skeletal muscle, and related phenotypes are ptosis and diplopia