UASp regulatory sequences drive expression of the Mer coding region found in Mer3.UAS.Tag:MYC.
Expression of Mer3.Scer\UAS.P\T under the control of Scer\GAL4da.G32 results in chromosome nondisjunction.
Expression of Mer3.Scer\UAS.P\T under the control of Scer\GAL4da.G32 rescues the lethality associated with Mer4.