Expression of Mmus\Per1tim.PS in an otherwise wild-type background has no effect on the free-running behavioural rhythm of the flies.
Mmus\Per1tim.PS is a suppressor of abnormal locomotor rhythm phenotype of per01
Mmus\Per1tim.PS shows some rescue of the per01 phenotype; 5.4% of the rescued flies show locomotor activity rhythms in constant darkness. The range of the free-running period is 17.5 to 31.5 hours.