Mutation within the per circadian regulatory sequence fragment, changing the first 10bp from GAGAAACCGT to AGAGGGTTAC.
perCRS.hs.10mut partially rescues per01
perCRS.hs.10mut rescues locomotor activity rhythms in per01 mutants to the same degree as seen with perCRS.hs : the rescued flies have shorter locomotor activity rhythm periods than wild-type controls.