Because OPMD defects in Drosophila depends on the levels of PABPN1-17ala, we verified using western blots, that the reduced wing position defects and muscle degeneration in the presence of UPS heterozygous mutants were not due to decreased levels of PABPN1-17ala (S4B Fig). Here, PABPN1 is linked to oculopharyngeal muscular dystrophy.