A TI{KozakGAL4} DNA cassette has been inserted into Dpck, replacing the coding sequence (coordinates of deleted sequence are 3R:7082247..7083164 , release 6 genome). This results in a simultaneous knock-out of Dpck plus a knock-in of GAL4 that is expected to be expressed under the control of the endogenous regulatory sequences of Dpck (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: GTTAAAATACTATAATTCGATGG and GTGTCTGTGCGTGCCATACGAGG. The 3' end of the deletion associated with the insertion is 61 bp downstream of the 3' end of the Tailor gene and may affect the proper 3' end formation of its transcripts.