Genomic Cirl sequence, in which intron 6 of transcript isoform I has been removed, has been inserted into the attP site in TI{TI}CirlKO.attP.w-, reconstituting a Cirl locus that exclusively expresses the Cirl-7TM protein isoform. The expressed Cirl-7TM protein is tagged with 2xTag:V5 in the third intracellular loop.