Expression of the complete cDNA is under the control of the sev enhancer and Hsp70 promoter sequences.
Flies carrying two copies of this transgene generally have wild-type eyes, though on occasion slightly rough eyes can be seen, where it appears that the R7 photoreceptor cell has been transformed into a R1-R6 class photoreceptor cell.
The addition of doshs.sev enhances the rough eye phenotype seen in sevS11.T:Hsap\MYC flies.
The addition of doshs.sev strongly suppresses the rough eye phenotype seen in cswCS.hs.2sev; dos1.46 flies. Heat shock expression of doshs.sev in dos1.46/dos2.42 flies, leads to adults which occasionally lack R7 or the normal number of outer photoreceptors. Heat shock expression of doshs.sev rescues the lethality and almost rescues the eye phenotype seen in dos1.46/dos2.42 flies.