P{luc-sniffer} insertion within the transcription unit, in intron 1 of the CG6145a transcript and upstream of the first exon of the CG6145b transcript.
80% of homozygous flies show rhythmic locomotor activity, with a period of 24.7 +/- 0.1 hours. 62% of heterozygous flies show rhythmic locomotor activity, with a period of 24.6 +/- 0.1 hours.