A TI{KozakGAL4} DNA cassette has been inserted into Hex-C, replacing the coding sequence (coordinates of deleted sequence are 2R:15218873..15220304 , release 6 genome). This results in a simultaneous knock-out of Hex-C plus a knock-in of GAL4 that is expected to be expressed under the control of the endogenous regulatory sequences of Hex-C (predicted to gene trap all annotated transcripts of the gene). The deletion also removes part of CG8079 (Hex-C is nested within an intron of CG8079). 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: TCGTTACTCATCGTTCGAGGCGG and ACTATTGTAGCAATAATAGAAGG.