Anti-KLLN antibodies are used in the immunodetection of the protein killin, p53 regulated DNA replication inhibitor. In humans, the canonical protein has a reported length of 178 amino acid residues and a mass of 20 kDa. Its subcellular localization is in the nucleus. KLLN is known to be a DNA-binding protein involved in S phase checkpoint control-coupled apoptosis by mediating p53/TP53-induced apoptosis. The KLLN gene has been associated with the disease, Cowden syndrome. Synonyms for this target antigen include killin. KLLN gene orthologs have been reported in the mouse and chimpanzee species. Some KLLN 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.