Anti-ATP1A4 antibodies are used in the immunodetection of the protein ATPase Na+/K+ transporting subunit alpha 4. In humans, the canonical protein has a reported length of 1029 amino acid residues and a mass of 114.2 kDa. Its subcellular localization is in the cell membrane. Up to 2 different isoforms have been reported for this protein. It is notably expressed in the testis. A member of the Cation transport ATPase (P-type) (TC 3.A.3) protein family, ATP1A4 is known to be the catalytic component of the active enzyme, which catalyzes the hydrolysis of ATP coupled with the exchange of sodium and potassium ions across the plasma membrane. Synonyms for this target antigen include ATP1AL2, sodium/potassium-transporting ATPase subunit alpha-4, ATPase, Na+/K+ transporting, alpha 4 polypeptide, ATPase, Na+/K+ transporting, alpha polypeptide-like 2, and ATP1A1. ATP1A4 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. A number of ATP1A4 antibodies have been mentioned in research publications and have associated citations. These antibodies are most commonly used in Western Blot experiments, among other applications.