Anti-NIBAN1 antibodies are used in the immunodetection of the protein niban apoptosis regulator 1. In humans, the canonical protein has a reported length of 928 amino acid residues and a mass of 103.1 kDa. Its subcellular localization is in the cytoplasm. It is reported to be expressed in various types of thyroid tumor such as papillary thyroid carcinomas and oxyphilic thyroid tumors but not in normal thyroid tissue. A member of the Niban protein family, NIBAN1 is reported to regulate phosphorylation of a number of proteins involved in translation regulation including EIF2A, EIF4EBP1 and RPS6KB1. Synonyms for this target antigen include cell growth-inhibiting gene 39 protein, family with sequence similarity 129 member A, and protein Niban 1. NIBAN1 gene orthologs have been reported in the mouse, rat, bovine, zebrafish, chimpanzee and chicken species.