ScerGAL4Gr39b.4.4 drives expression in the following series of neurons. Larval gustatory receptor neuron of the epiphysis DP1, where it is coexpressed with ScerGAL4Gr33a.4.7, ScerGAL4Gr66a.1.8, ScerGAL4Gr93a.5, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, 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 hypopharyngeal organ PP1 and PP2 where it is coexpressed with ScerGAL4Gr33a.4.7, ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, 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 ScerGAL4Gr33a.4.7, ScerGAL4Gr66a.1.8, ScerGAL4Gr32a.3.7.PW, ScerGAL4Gr28a.PT, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, 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 ScerGAL4Gr33a.4.7, ScerGAL4Gr66a.1.8, ScerGAL4Gr28a.PT, ScerGAL4Gr22b.5.8, ScerGAL4Gr39a.a.3.4, ScerGAL4Gr39a.d.1.7, ScerGAL4Gr93c.3.8 and ScerGAL4Gr93d.2.4.
ScerGAL4Gr39b.4.4 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.
ScerGAL4Gr39b.4.4 is expressed in gustatory neurons of 4 of the bitter-sensitive short labellar taste bristles.
ScerGAL4Gr39b.4.4 is expressed in a few of the short bitter-sensitive sensilla of the labellum.
ScerGAL4Gr39a.d.1.7 drives expression in two gustatory receptor neurons of the larval posterior pharyngeal sense organ (PPS or hypopharyngeal sense organ) and in one neuron of the dorsal pharyngeal sense organ (DPS or epiphysis).