Anti-ATP synthase membrane subunit k antibodies are used for the immunodetection of the protein encoded by the ATP5MK gene. In humans, the canonical protein has a reported length of 58 amino acid residues and a mass of 6.5 kDa. Its subcellular localization is in the mitochondria. The gene encoding this protein is implicated in Mitochondrial complex V deficiency. Other names for this target antigen include ATP synthase membrane subunit DAPIT, mitochondrial, Diabetes Associated Protein in Insulin-sensitive Tissues, HCV F-transactivated protein 2, and ATP synthase membrane subunit K, mitochondrial. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.