Enriched in head mesodermal cell; neurons; retrovesicular ganglion; and ventral nerve cord based on microarray; tiling array; RNA-seq; and single-cell RNA-seq studies. Is affected by several genes including skn-1; eat-2; and clk-1 based on microarray and RNA-seq studies. Is affected by fourteen chemicals including rotenone; D-glucose; and stavudine based on RNA-seq and microarray studies.