Genomic fragment (derived from fosmid library clone pflyfos016675) encompassing the dom gene. The dom open reading is tagged at the N-terminal end with a 2xTY1-sGFP-3xFLAG tag, resulting in both the A and B isoforms being tagged (isoforms A and B correspond to the proteins encoded by the DOM-RA and DOM-RE transcripts, respectively, FlyBase release FB2016_03).