Anti-PHAX antibodies are used in the immunodetection of the protein phosphorylated adaptor for RNA export. In humans, the canonical protein has a reported length of 394 amino acid residues and a mass of 44.4 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is notably widely expressed in many tissue types. A member of the PHAX protein family, PHAX is known to be involved with protein transport. Post-translational modifications have been described, including phosphorylation. Synonyms for this target antigen include phosphorylated adapter RNA export protein, RNA U small nuclear RNA export adapter protein, RNA U, small nuclear RNA export adapter (phosphorylation regulated), and RNUXA. PHAX gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Some PHAX antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.