Anti-JUN antibodies are used in the immunodetection of the protein Jun proto-oncogene, AP-1 transcription factor subunit. In humans, the canonical protein has a reported length of 331 amino acid residues and a mass of 35.7 kDa. Its subcellular localization is in the nucleus. It is reported to be expressed in the developing and adult prostate and prostate cancer cells. A member of the BZIP protein family, JUN is reported to be a transcription factor that recognizes and binds to the AP-1 consensus motif 5'-TGA[GC]TCA-3'. JUN is also used as a cellular marker for characterizing neuronal cells. Synonyms for this target antigen include AP1, c-Jun, cJUN, p39, transcription factor Jun, Jun activation domain binding protein, activator protein 1, and AP-1. JUN gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Over 3600 citations in the literature describe the use of JUN antibodies in research. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.