In larvae, expression only begins in the late (wandering, non-feeding) third instar stage, despite how anti-Ilp2 staining is visible in insulin secreting cells of early third instar larvae. In larvae and adults, expression often colocalizes with serotonin-immunoreactive neuron processes.
Ablation (using hidUAS.cUa and rprUAS.cUa) of Scer\GAL45-HT1A.ERGP cells does not affect appetitive (fructose) or aversive (salt) olfactory memory or naive preference for olfactory or gustatory stimuli in larvae, compared to controls.