Anti-RAD1 antibodies are used in the immunodetection of the protein RAD1 checkpoint DNA exonuclease. In humans, the canonical protein has a reported length of 282 amino acid residues and a mass of 31.8 kDa. Its subcellular localization is in the nucleus. Up to 3 different isoforms have been reported for this protein. It is reported to be expressed in the testis, uterus, bladder, spleen, ovaries, lung, brain and muscle. A member of the Rad1 protein family, RAD1 is a known component of the 9-1-1 cell-cycle checkpoint response complex that plays a major role in DNA repair. Synonyms for this target antigen include REC1, cell cycle checkpoint protein RAD1, DNA repair exonuclease REC1, DNA repair exonuclease rad1 homolog, RAD1 checkpoint clamp component, and HRAD1. RAD1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of RAD1 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.