unc-24 encodes a protein that contains a stomatin-like domain and a lipid transfer domain; unc-24 activity is essential for normal locomotion and for wild-type sensitivity to lipid-soluble volatile anesthetics; unc-24 is genetically epistatic to unc-79 and to unc-1, which encodes an additional stomatin whose stability and localization to the nerve ring are dependent upon UNC-24; unc-24 is expressed in the touch receptor neurons as well as neurons in the ventral cord.