Plays a role in several types of aversive gustatory associative learning including gustatory plasticity and salt avoidance learning. Neuropeptide ligand for the G-protein coupled receptor sprr-2. Neuropeptide ligand for the G-protein coupled receptor sprr-2. Neuropeptide ligand for the G-protein coupled receptor sprr-2. Expressed in the ventral and dorsal nerve cords and ventral nerve cord motor neurons (PubMed:30779740). Also expressed in tail neurons and head neurons including SAB and DBI motor neurons (PubMed:30779740).