Anti-protease, serine 21 antibodies enable researchers to detect and measure the protease, serine 21 antigen in biological samples. This target is a reported synonym of the PRSS21 gene, which encodes serine protease 21. This protein is known to function in proteolysis and spermatogenesis, among other biological roles. The human version of protease, serine 21 has a canonical amino acid length of 314 residues and a protein mass of 34.9 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the lung and testis. Other names for this target antigen include ESP-1, ESP1, and TEST1. Indicated applications for protease, serine 21 antibodies listed below include Western Blot and Immunohistochemistry.