Ready-to-use ELISA kits are available for the detection of Eca40, an alias of the protein, branched chain amino acid transaminase 2. The official gene symbol is BCAT2. The protein, with a mass of 44.3 kDa and length of 392 residues, is reported to be cytoplasmic and mitochondrial. It is a member of the Class-IV pyridoxal-phosphate-dependent aminotransferase family and may be known by other names, including: PP18, BCT2, placental protein 18, branched chain aminotransferase 2 mitochondrial, branched chain amino-acid transaminase 2 mitochondrial.