Consists of the ort C1a enhancer, hs43 mini-promoter and a VP16(AD)::Zip+ hemidriver (component of a 'split driver' system, contains the VP16 activation domain).
Scer\GAL4Act.PU, Ecol\lexADBD.UAS, Hsim\VP16AD.C1a.ort, baboa.UAS rescues babo9