Transgenic construct used in a study of the Fab-7 element. Contains two divergently transcribed reporters: a w+C marker and a lacZ reporter driven by a minimal eve promoter. A 500bp eve stripe 3 enhancer, a 2.5kb spacer (derived from the λ bacteriophage) and a 300bp StyI-XhoI DNA fragment containing the NEE rho enhancer have been inserted between the two divergent promoters.