UASt regulates an 874 base pair genomic fragment corresponding to part of the Apoltp 7th exon cloned as an inverted tandem repeat containing an intervening 81 base pair region.
Expression induced in the adult fat body using Scer\GAL4Cg.PA and the Gal80[ts] technique results in a pronounced reduction in female fertility two days after activation. In these animals, a fraction of the follicles degenerate.