Enriched in several structures, including accessory cell; anterior hypodermis; head neurons; intestine; and nerve ring neurons based on tiling array; RNA-seq; and single-cell RNA-seq studies. Is affected by several genes including swsn-1; mut-16; and cua-1 based on microarray and RNA-seq studies. Is affected by twenty-nine chemicals including 1-methylnicotinamide; methylmercuric chloride; and sesamin based on RNA-seq and microarray studies.