Anti-RPP21 antibodies are used in the immunodetection of the protein ribonuclease P/MRP subunit p21. In humans, the canonical protein has a reported length of 154 amino acid residues and a mass of 17.6 kDa. Its subcellular localization is in the nucleus. Up to 4 different isoforms have been reported for this protein. A member of the Eukaryotic/archaeal RNase P protein component 4 protein family, RPP21 is known to be a component of ribonuclease P, a ribonucleoprotein complex that generates mature tRNA molecules by cleaving their 5'-ends. Synonyms for this target antigen include RNaseP protein p21, ribonuclease P/MRP 21kDa subunit, ribonucleoprotein V, and ribonuclease P protein subunit p21. RPP21 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. Western Blot is a widely used application for the RPP21 antibodies listed below. In addition, ELISA is also a common application.