UAS regulatory sequences drive expression of a short inverted repeat.
Females heterozygous for Pp4-19CHMS01841 and Scer\GAL4mat.αTub67C.T:Hsim\VP16 crossed to Pp4-19CHMS01841 males results in: 13% hatching; egg/embryonic phenotype: "segmentation defects, germband retraction defects"; maternal effect.