Enriched in several structures, including interfacial epithelial cell; male distal tip cell; pharyngeal cell; rectal gland cell; and somatic gonad precursor based on RNA-seq; single-cell RNA-seq; and microarray studies. Is affected by several genes including daf-2; dpy-10; and hsf-1 based on microarray; tiling array; and RNA-seq studies. Is affected by seventeen chemicals including methylmercuric chloride; sesamin; and stavudine based on microarray and RNA-seq studies.