Anti-NFKB inhibitor delta antibodies are used for the immunodetection of the protein encoded by the NFKBID gene. In humans, the canonical protein has a reported length of 313 amino acid residues and a mass of 33.5 kDa. Its subcellular localization is in the nucleus. Alternative splicing is reported to yield 3 different isoforms for this protein. A member of the NF-kappa-B inhibitor protein family, it is reported to regulate the expression of IL-2, IL-6, and other cytokines through regulation on NF-kappa-B activity. Other names for this target antigen include I-kappa-B-delta, T-cell activation NFKB-like protein, ikB-delta, ikappaBdelta, nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, delta, and NF-kappa-B inhibitor delta. Gene orthologs have been identified in the mouse, rat, bovine, frog and chimpanzee species. Some NFKB inhibitor delta antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.