Anti-U2AF1L4 antibodies are used in the immunodetection of the protein U2 small nuclear RNA auxiliary factor 1 like 4. In humans, the canonical protein has a reported length of 220 amino acid residues and a mass of 25.7 kDa. Its subcellular localization is in the nucleus and cytoplasm. Up to 3 different isoforms have been reported for this protein. It is notably widely expressed in many tissue types. A member of the Splicing factor SR protein family, U2AF1L4 is reported to be a RNA-binding protein that function as a pre-mRNA splicing factor. Synonyms for this target antigen include U2 auxiliary factor 26, U2 small nuclear RNA auxiliary factor 1-like 3, U2 small nuclear RNA auxiliary factor 1-like protein 3, and splicing factor U2AF 26 kDa subunit. U2AF1L4 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. Some U2AF1L4 antibodies may have been used in research and have associated citations. These antibodies are most commonly used in Western Blot experiments, among other applications.