A TI{KozakGAL4} DNA cassette has been inserted into CG17287, replacing the coding sequence (coordinates of deleted sequence are 2R:17157178..17158190 , release 6 genome). This results in a simultaneous knock-out of CG17287 plus a knock-in of GAL4 that is expected to be expressed under the control of the endogenous regulatory sequences of CG17287 (predicted to gene trap all annotated transcripts of the gene). The TI{KozakGAL4} cassette was inserted via the CRISPR/Cas-9 drop-in technique, using a dsDNA donor vector with homology arms of length 200bp. The sgRNA sequences used to target the gene were: TTCCCCAATCGGGCACATTCTGG and GCCACCTTTCAATGAAGAATAGG. The 3' end of the deletion associated with the insertion is 53 bp downstream of the 3' end of the CG17290 gene and may affect the proper 3' end formation of its transcripts.