Anti-RHNO1 antibodies are used in the immunodetection of the protein RAD9-HUS1-RAD1 interacting nuclear orphan 1. In humans, the canonical protein has a reported length of 238 amino acid residues and a mass of 26.7 kDa. Its subcellular localization is in the nucleus and chromosomes. Up to 2 different isoforms have been reported for this protein. It is reported to be weakly expressed in the testis, prostate, ovary, thymus and small intestine. RHNO1 is reported to play a role in DNA damage response (DDR) signaling upon genotoxic stresses such as ionizing radiation (IR) during the S phase. Synonyms for this target antigen include Rad9, Rad1, Hus1 interacting nuclear orphan, rAD9, RAD1, HUS1-interacting nuclear orphan protein, and RAD9, HUS1, RAD1-interacting nuclear orphan protein 1. RHNO1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. These RHNO1 antibodies are widely used in Western Blot experiments, among other applications.