Anti-SNRPN upstream open reading frame antibodies are used for the immunodetection of the protein encoded by the SNURF gene. In humans, the canonical protein has a reported length of 71 amino acid residues and a mass of 8.4 kDa. Its subcellular localization is in the nucleus. It is found to be expressed in the heart, skeletal muscle and lymphoblasts. It is a member of the SNURF protein family. Other names for this target antigen include SNRPN upstream reading frame protein. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species.