UASp regulatory sequences drive expression of U2A.
U2AUASp.cWa/Scer\GAL4αTub84B.PL rescues U2A1.W
Expression of U2AScer\UAS.P\T.cWa driven by Scer\GAL4αTub84B.PL rescues sterility in U2A1.W/U2A1.W males.