Ready-to-use ELISA kits are available for the detection of GACR, an alias of the protein, ornithine aminotransferase. The official gene symbol is OAT. The protein, with a mass of 48.5 kDa and length of 439 residues, is reported to be mitochondrial. It is a member of the Class-III pyridoxal-phosphate-dependent aminotransferase family and may be known by other names, including: HOGA, GACR, ornithine-oxo-acid aminotransferase, ornithine delta-aminotransferase, gyrate atrophy, and ornithine aminotransferase mitochondrial, and OKT.