The genomic tim promoter drives expression of a mutated tim cDNA, in which the ATG start codon at position 243-245 is mutated to GGG so that only the short tim isoform can be expressed from this transgene.
timmTimS flies kept in constant light conditions show locomotor arrhythmicity, as do wild-type flies.
timmTimS partially rescues tim01
Expression of timmTimS results in significant rescue of the arrhythmic tim01 locomotor phenotype in males.