Enriched in head mesodermal cell; hypodermis; neurons; rectal epithelial cell; and rectal gland cell based on tiling array; RNA-seq; and single-cell RNA-seq studies. Is affected by several genes including daf-2; daf-12; and hsf-1 based on microarray and RNA-seq studies. Is affected by thirteen chemicals including rotenone; D-glucose; and Zidovudine based on RNA-seq and microarray studies.