Expression of a Ubx version IVa cDNA is governed by UASt regulatory sequences.
denticle belt, with Scer\GAL4arm.PS
embryonic/first instar larval cuticle, with Scer\GAL4arm.PS
Keilin's organ, with Scer\GAL4arm.PS
Embryonic/first instar larval cuticle phenotype due to UbxIa.Scer\UAS; Scer\GAL4arm.PS : only 25% lack Keilin's organs; denticle phenotypes are like those due to UbxIa.Scer\UAS; Scer\GAL4arm.PS.