UASt regulatory sequences drive expression of a 500bp inverted repeat.
Flies expressing larkNIG.8597R under the control of Scer\GAL4phm.PO display arrhythmic eclosion profiles in DD conditions (constant darkness), although variability is seen across experiments. Co-expressing Dcr-2Scer\UAS.cDa reduces variability, with all flies tested show weakly rhythmic eclosion profiles.