The 5' (1.7kb) and 3' (8.3kb) flanking regions of Ir94f are fused to the 5' and 3' end of GAL4 respectively.
ScerGAL4Ir94f.PK drives expression in a single chemosensory neuron of adult labral sensillum 7 that also co-expresses ScerGAL4Ir60b.PK.
ScerGAL4Ir94f.PK drives expression exclusively in two neurons of the chemosensory labral sensillum 7.