UASt regulatory sequences drive expression of an inverted repeat.
Expression of huiKK112899 under the control of Scer\GAL4ptc-559.1 results in stubby wings, narrows the L3-L4 intervein region and reduces the anterior crossvein. Gaps in L3 are also seen. Expression throughout the wing using Scer\GAL4C-765 results in small wings and causes L3-L4 malformation and occasional partial ablation of the anterior crossvein. A small posterior compartment is seen when huiKK112899 is expressed under the control of Scer\GAL4en-e16E. The L3-L4 intervein region is not reduced and the anterior crossvein is present. However the phasing of the bristles at the posterior wing margin is disturbed.