Ready-to-use ELISA kits are available for the detection of NGF1b, an alias of the protein, nuclear receptor subfamily 4 group A member 2. The official gene symbol is NR4A2. The protein, with a mass of 66.6 kDa and length of 598 residues, is reported to be cytoplasmic and nuclear. It is a member of the Nuclear hormone receptor family, NR4 subfamily and may be known by other names, including: orphan nuclear receptor NR4A2, nur related protein-1 human homolog of, intermediate-early receptor protein, immediate-early response protein NOT, T-cell nuclear receptor NOT, and transcriptionally inducible nuclear receptor related 1.