The phase of the evening activity peak of flies carrying perXLG.T:Ecol\lacZ in a per+ background is significantly different to that of wild-type controls, being earlier, when flies are kept under 12 hour light/12 hour dark cycling conditions. The free-running locomotor activity periods of flies carrying perXLG.T:Ecol\lacZ kept under DD conditions are shorter than wild-type controls, and only 91% of the flies are rhythmic under these conditions.
perXLG.lacZ partially rescues per01