Evokes contractions in the radula protractor muscle, and may regulate feeding behavior and gut motility by controlling muscle contraction of the buccal mass. Expression is seen in the peripheral and central nervous systems in tissues such as the brain, the inferior buccal ganglion, the gastric ganglion, the olfactory lobe, the peduncle lobe and the optic lobe. Expression in the brain is distributed in the median inferior frontal lobe, the superior buccal lobe, the prebranchial lobe and the pedal lobe. Not expressed in the vasomotor lobe or the palliovisceral lobe that controls the cardiac system. Belongs to the SCP family.