A TI{KozakGAL4} DNA cassette has been inserted into CG2124, replacing the coding sequence (coordinates of deleted sequence are X:10596249..10598404 , release 6 genome). This results in a simultaneous knock-out of CG2124 plus a knock-in of GAL4 that is expected to be expressed under the control of the endogenous regulatory sequences of CG2124 (predicted to gene trap all annotated transcripts of the gene). The insertion is also within CG1628 and is not predicted to gene trap this 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: AAATATCGCTCTAAAACATGTGG and CCAAATTGCAAAAATTTAGCAGG.