These protease, serine 21 ELISA kits are immunodetection tools for measuring specific protein levels in biological samples. protease, serine 21 is an alias of the human PRSS21 gene, which encodes the protein, serine protease 21. Notably, protease, serine 21 is known to play a role in proteolysis and spermatogenesis, among other functions. The PRSS21 protein is 314 amino acid residues in length and 34.9 kilodaltons in mass. However, as many as 3 protein isoforms have been identified. It is localized to the cell membrane of the cell. In terms of tissue specificity, it is reported to be highly expressed in premeiotic testicular germ cells, mostly late pachytene and diplotene spermatocytes. This protein is known to be glycosylated. Other names for this target antigen include ESP-1, ESP1, and TEST1. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.