Anti-PPA2 antibodies are used in the immunodetection of the protein inorganic pyrophosphatase 2. In humans, the canonical protein has a reported length of 334 amino acid residues and a mass of 37.9 kDa. Its subcellular localization is in the mitochondria. Up to 5 different isoforms have been reported for this protein. It is notably expressed in the brain, gastric carcinoma, lung, ovary, skeletal muscle, umbilical cord blood and a cell line derived from kidney proximal tubule epithelium. A member of the PPase protein family, PPA2 is known to be involved with metabolic processes. Synonyms for this target antigen include SCFAI, SCFI, SID6-306, inorganic pyrophosphatase 2, mitochondrial, PPase 2, and HSPC124. PPA2 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Some PPA2 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.