NFIV is a reported alias of the human protein 'X-ray repair cross complementing 5', encoded by the gene XRCC5. Anti-NFIV antibodies are available from several suppliers. The full protein is reported to be 732 amino acid residues in length. Based on antigen name, there may be fly, canine, porcine, monkey, mouse and rat variants of this protein. See the antibody supplier page for important details, including specific immunogenicity and validated applications.