Expression of ScerGAL4Gr28b.b.PT is seen in two to three taste receptors associated with S-type bristles. Expression of ScerGAL4Gr28b.b.PT is seen in a single, large cell at the base of the maxillary palpus that is not an olfactory sensory neuron. Expression of ScerGAL4Gr28b.b.PT is seen in multidendritic neurons of all abdominal segments of the larvae.