Anti-NeuN antibodies are protein reagents that detect specific antigens. The NeuN antigen is another term for the human protein RNA binding fox-1 homolog 3, encoded by the RBFOX3 gene. The protein is known to function in mRNA processing and nervous system development, among other biological roles. Canonically, it has an amino acid length of 312 residues and a mass of 33.9 kilodaltons. Its subcellular localization is in the nucleus and cytoplasm and it is expressed in the hippocampus, colon, cerebral cortex, cerebellum, and caudate. NeuN is also used as a cellular marker for characterizing neuronal.