Anti-ATF1 antibodies are used in the immunodetection of the protein activating transcription factor 1. In humans, the canonical protein has a reported length of 271 amino acid residues and a mass of 29.2 kDa. Its subcellular localization is in the nucleus. Up to 2 different isoforms have been reported for this protein. It is notably widely expressed in many tissue types. A member of the BZIP protein family, ATF1 is known to bind the cAMP response element (CRE) (consensus: 5'-GTGACGT[AC][AG]-3'), a sequence present in many viral and cellular promoters. Synonyms for this target antigen include FUS/ATF-1, TREB36, cyclic AMP-dependent transcription factor ATF-1, cAMP-dependent transcription factor ATF-1, and EWS-ATF1. ATF1 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Over 70 citations in the literature describe the use of ATF1 antibodies in research. Western Blot is a widely used application for these antibodies. ELISA, Immunofluorescence, and Immunohistochemistry are also common applications.