A heat shock promoter drives expression of a 0.6kb cDNA fragment encoding Su(var)3-7 amino acids 755 to 970. The Su(var)3-7 protein is tagged at the N-terminal end with Tag:HA.
Expression of Su(var)3-7Δ7-B.hs.T:Ivir\HA1 suppresses variegation of w (carried on the P{Winkelried}D insertion) in In(2)Heidi-P{Winkelried}D flies.