Anti-HOGA antibodies enable researchers to detect and measure the HOGA antigen in biological samples. This target is a reported synonym of the OAT gene, which encodes ornithine aminotransferase. This protein is known to catalyze the reversible interconversion of L-ornithine and 2-oxoglutarate to L-glutamate semialdehyde and L-glutamate. The human version of HOGA has a canonical amino acid length of 439 residues and a protein mass of 48.5 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the mitochondria of cells and notably expressed in many tissues, such as the duodenum and small intestine. Other names for this target antigen include GACR and OATASE.