Ready-to-use ELISA kits are available for the detection of CMT1D, an alias of the protein, early growth response 2. The official gene symbol is EGR2. The protein, with a mass of 50.3 kDa and length of 476 residues, is reported to be nuclear. It is a member of the EGR C2H2-type zinc-finger protein family and may be known by other names, including: CMT1D, AT591, early growth response protein 2, KROX-20 Drosophila homolog (early growth response-2), E3 SUMO-protein transferase ERG2, and E3 SUMO-protein ligase EGR2, and KROX20.