Enriched in excretory gland cell; germ line; and in male based on RNA-seq and single-cell RNA-seq studies. Is affected by several genes including cyc-1; etr-1; and rsr-2 based on microarray; tiling array; and RNA-seq studies. Is affected by nine chemicals including methylmercuric chloride; Tunicamycin; and manganese chloride based on microarray and RNA-seq studies. Is predicted to encode a protein with the following domains: Peptidase S1, PA clan; Nematode trypsin-6-like family; and Chymotrypsin family Peptidase-S1.