Enriched in head mesodermal cell; head neurons; hypodermis; and neuronal sheath cell based on RNA-seq and single-cell RNA-seq studies. Is affected by several genes including nuo-6; atfs-1; and hsp-6 based on microarray and RNA-seq studies. Is affected by eleven chemicals including methylmercuric chloride; manganese chloride; and D-glucose based on microarray and RNA-seq studies.