Agam\en cDNA is expressed from an en minimal promoter and homing EcoRI-BamHI fragment (from -2.407 to +212bp) and an XbaI fragment of en 3' sequences. The en promoter fragment includes 2.6kb of regulatory DNA that causes transposons to home to the endogenous en gene at high frequencies.
mapping_comment: Rescue dependent upon insertion within the en region; less effective rescue if inserted within the inv region.