UAS regulates expression of a dati cDNA (GH06573, dati-PA). This is a leaky transgene, resulting in dati expression in the absence of driver.
datiUAS.cSa partially rescues dati102CDd-2
datiScer\UAS.cSa, in the absence of a Scer\GAL4 driver (owing to leaky expression), rescues the embryonic lethality of dati102CDd-2 up to the first instar.