Social Behavior in C. elegans.
	• Mutation in a neuropeptide-Y-like protein; the NPR-1 receptor. In mammals, important for “feeding”. • Clumping is controlled by an unknown neuropeptide acting through the receptor. • Secretion of the neuropeptide is probably regulated by food. • Proposed Model: Dispersing strains have a repellant response (mediated by NPR-1 receptor) that masks the attractant response.