A full length Rbf cDNA is expressed under the control of a heat shock promoter.
Adult Rbf14 flies rescued by expressing Rbfhs.PD during the first 3 days after egg laying show a number of alterations in adult structures such as abnormal macrochaetae on the notum and rough eyes. All these adult phenotypes are rescued when Rbf function is provided throughout development using heat shock to express Rbfhs.PD. These adult phenotypes are also rescued without heat shock if the flies are also carrying E2f91/E2f164.
Expression of Rbfhs.PD using heat shock can rescue the lethality of Rbf14 flies. One or two heat pulses of heat shock in the first 2 days after egg laying (AEL) is sufficient to rescue a small percentage of flies, while complete rescue of lethality is achieved by expression of Rbfhs.PD during the first 3 days AEL.