gustatory receptor neuron high salt/bitter-sensing neuron 2010-03-09T11:37:02Z VFB:FBbt_00100044 bitter neuron FBbt:00100044 L2 GRN A gustatory receptor neuron that is responsive to high concentrations of salt or to bitter compounds, or both (Meunier et al., 2003; Montell, 2009). It triggers an aversive behavior (Freeman and Dahanukar, 2015). fly_anatomy.ontology The projection of L2 GRNs (bitter-sensitive) of the labellum to the subesophageal zone, and of leg gustatory sensilla to the central brain are segregated from the projections of S cells (sugar-sensitive) to the thoracic ganglion (Wang et al., 2004).