Anti-H3-3B antibodies are used in the immunodetection of the protein H3.3 histone B. It is notably widely expressed in many tissue types. Synonyms for this target antigen include H3-3A, H3.3B, H3F3B, histone H3.3, H3 histone family member 3B, H3 histone, family 3B (H3.3B), and BRYLIB2. H3-3B gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species.