Anti-DNAJB1 antibodies are used in the immunodetection of the protein DnaJ heat shock protein family (Hsp40) member B1. In humans, the canonical protein has a reported length of 340 amino acid residues and a mass of 38 kDa. Its subcellular localization is in the nucleus and cytoplasm. Up to 2 different isoforms have been reported for this protein. It is notably widely expressed in many tissue types. DNAJB1 is known to be involved with brain development and the regulation of transcription. Synonyms for this target antigen include Hdj1, Hsp40, RSPH16B, Sis1, dnaJ homolog subfamily B member 1, and HSPF1. DNAJB1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Over 100 citations in the literature describe the use of DNAJB1 antibodies in research. Western Blot is a widely used application for these antibodies. ELISA, Immunofluorescence, and Immunohistochemistry are also common applications.