These OX19 ELISA kits are immunodetection tools for measuring the levels of OX19 in biological samples. OX19 is an alias of the human AFF2 gene, which encodes the protein, ALF transcription elongation factor 2. Notably, OX19 is known to play a role in brain development and mRNA processing, among other functions. The AFF2 protein is 1311 amino acid residues in length and 144.8 kilodaltons in mass. However, as many as 7 protein isoforms have been identified. It is localized to the nucleus of the cell. Other names for this target antigen include FMR2, FMR2P, and FRAXE. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.