Anti-ATP4A antibodies are used in the immunodetection of the protein ATPase H+/K+ transporting subunit alpha. In humans, the canonical protein has a reported length of 1035 amino acid residues and a mass of 114.1 kDa. Its subcellular localization is in the cell membrane. It is reported to be expressed in gastric parietal cells. A member of the Cation transport ATPase (P-type) (TC 3.A.3) protein family, ATP4A is known to be involved with the response to xenobiotic compounds. Synonyms for this target antigen include potassium-transporting ATPase alpha chain 1, ATPase H+/K+ transporting alpha subunit, ATPase, H+/K+ exchanging, alpha polypeptide, ATPase, H+/K+ transporting, alpha polypeptide, and ATP6A. ATP4A gene orthologs have been reported in the mouse, rat, bovine, frog and chimpanzee species. A number of ATP4A antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.