The RMCE cassette of the TI{CRIMIC.TG4.1}CG1688CR01570-TG4.1 insertion has been replaced with a FlpTag conditional tagging cassette that is inserted in the same orientation to the direction of CG1688 transcription. In the absence of FLP, the CG1688 gene is tagged with EGFP, but in the presence of FLP recombinase, the FlpTag cassette is stably inverted, resulting in loss of this tagging.