Deletion of 2363bp from the 5' end of the ftz upstream element, fused upstream of a minimal Hsp70 promoter driving expression of lacZ.
A sub-fragment (base pairs 2363 to 2574) of the ftz autoregulatory element AE is fused upstream of a minimal Hsp70 promoter driving expression of lacZ (enhancer element coordinates refer to location within ftz upstream element, FBrf0048801).