Conditional adult-specific over-expression (using TubGAL80ts) of larkF10A.F89A.Scer\UAS driven by Scer\GAL4P2.4.Pdf does not significantly alter circadian period.
Flies expressing larkF10A.F89A.Scer\UAS under the control of Scer\GAL4tim.PE have completely normal locomotor activity rhythms.