Sense-antisense transcription of ppk12 sequence (driven by two convergent copies of UAS regulatory sequence) results in generation of dsRNA that targets ppk12.
Flies expressing P{Sym-UAS-ppk12.RNAi} (which carries the ppk12RNAi.Sym.Scer\UAS and ppk12a.RNAi.Sym.Scer\UAS alleles) under the control of Scer\GAL4elav.PLu show normal hygrosensing behaviour.