All introns are missing. Construct extends to same 5' and 3' limits as for per+t13.2. Derived from type B cDNA that carries a deletion of 288 nucleotides from exon 5, encodes a polypeptide 96 amino acids shorter than the type A polypeptide.
Rescues the arrhythmicity of per01 flies.
per expression, with respect to behavioural circadian rhythms, is dosage compensated.