8.0kb per DNA, 5' end begins within the first intron so contains all coding regions and 3' flanking sequence.
8.0kb genomic fragment containing the entire per coding region, but lacking all 5' sequences, the first exon and approximately 1kb of the 2.3kb first intron.
per01 flies transformed with this allele are frequently rhythmic, though circadian periods are slightly longer than the normal range.
per expression, with respect to behavioural circadian rhythms, is dosage compensated.