ScerGAL4Gr33a.4.7 drives expression in the following series of neurons. Larval gustatory receptor neuron of the epiphysis DP1, where it is coexpressed with ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr93a.5, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39b.4.4, ScerGAL4Gr9a.6.3, ScerGAL4Gr22d.3.1, ScerGAL4Gr22e.2.5, ScerGAL4Gr28b.a.3, ScerGAL4Gr39a.b.1, ScerGAL4Gr58b.1, and ScerGAL4Gr59d.4.1. Larval gustatory receptor neuron of the epiphysis DP2 where it is coexpressed with ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr77a.4 and ScerGAL4Gr93b.5.3. Larval gustatory receptor neuron of the hypophysis VP1 and VP2 where it is coexpressed with ScerGAL4Gr66a.1.8 and ScerGAL4Gr68a.PB. Larval gustatory receptor neuron of the hypopharyngeal organ PP1 and PP2 where it is coexpressed with ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39b.4.4, ScerGAL4Gr39a.d.1.7, ScerGAL4Gr93c.3.8 and ScerGAL4Gr93d.2.4 Larval gustatory receptor neuron of the hypopharyngeal organ PP3 where it is coexpressed with ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr28a.PT, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39b.4.4, ScerGAL4Gr39a.d.1.7, ScerGAL4Gr93c.3.8 and ScerGAL4Gr93d.2.4 Larval gustatory receptor neuron of the hypopharyngeal organ PP4 where it is coexpressed with ScerGAL4Gr66a.1.8, ScerGAL4Gr28a.PT, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39b.4.4, ScerGAL4Gr39a.d.1.7, ScerGAL4Gr93c.3.8 and ScerGAL4Gr93d.2.4.
Expression of UAS- mCD8::GFP via ScerGAL4Gr33a.4.7 confirmed that it is expressed in 12 GRN pairs. These 12 pairs are suggested to represent the entire set of larval bitter receptor neurons. They are: (i) two pairs B1 and B2 in the dorsolateral group of sensilla of the TO, (ii) four pairs C1-C4 in the distal group of TO sensilla, (iii) two pairs D1 and D2 in the DPS (epiphysis), (iv) two pairs E1 and E2 in the VPS (hypophysis), and (v) two pairs F1 and F2 in the PPS (hypopharyngeal organ).
ScerGAL4Gr33a.4.7 drives expression in adult abdominal multidendritic neurons with with dorsal processes extending along the left-right axis, as well as in multidendritic neurons with lateral processes extending anteroposteriorly; these major processes have several protruding dendrites. Expression is also observed in projections to the abdominal ganglion.
ScerGAL4Gr33a.4.7 is expressed in the gustatory neurons of all of the bitter-sensitive short labellar taste bristles, and the gustatory neurons of all of the intermediate labellar taste bristles.
ScerGAL4Gr33a.4.7 is expressed in all of the short and intermediate bitter-sensitive sensilla of the labellum.
ScerGAL4Gr33a.4.7 drives expression in 6 gustatory receptor neurons of the larval terminal organ, two of these having its cell body in the dorsal organ ganglion (TO-dorsolateral group). All 6 neurons co-express ScerGAL4Gr66a.1.8. One of the neurons of the TO-dorsolateral group also expresses ScerGAL4Gr10a.3.7 and ScerGAL4Gr32a.3.7.PW. The other terminal organ neurons express different combinations of drivers. The first neuron expresses ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr28b.e.4.245, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39a.b.1, ScerGAL4Gr59d.4.1, ScerGAL4Gr9a.6.3, ScerGAL4Gr22e.2.5, ScerGAL4Gr22a.4.2, ScerGAL4Gr28b.a.3, ScerGAL4Gr36b.0.9, ScerGAL4Gr36c.2.5, ScerGAL4Gr58b.1, ScerGAL4Gr59a.1.5, ScerGAL4Gr59c.5.5 and ScerGAL4Gr93b.5.3. The second neuron co-expresses ScerGAL4Gr39a.a.3.4, ScerGAL4Gr57a.6, ScerGAL4Gr59d.4.1, ScerGAL4Gr47b.2 and ScerGAL4Gr94a.3.7. The third neuron co-expresses ScerGAL4Gr57a.6 and ScerGAL4Gr97a.1. The fourth neuron expresses ScerGAL4Gr39a.b.1 and ScerGAL4Gr59d.4.1. Expression of ScerGAL4Gr33a.4.7 is also found in two neurons of the dorsal pharyngeal sense organ (DPS or epiphysis), two neurons of the posterior pharyngeal sense organ (PPS or hypopharyngeal sense organ) and in two neurons of the ventral pharyngeal sense organ (VPS or hypophysis).