The putative CapaR promoter sequence from directly upstream of the predicted translation initiation codon (bases -1 to -1501) is fused upstream of sequence encoding a GAL4 driver.
ScerGAL4CapaR.1.5 drives expression in the Malpighian tubule Type I cells (principal cells) of the main segments of Malpighian tubules in larvae and adults; expression is excluded from stellate cells.