Anti-RNA polymerase I subunit H antibodies are used for the immunodetection of the protein encoded by the POLR1H gene. In humans, the canonical protein has a reported length of 126 amino acid residues and a mass of 13.9 kDa. Its subcellular localization is in the nucleus. A member of the Archaeal RpoM/eukaryotic RPA12/RPB9/RPC11 RNA polymerase protein family, it is known to be involved with metabolic processes. Other names for this target antigen include HTEX-6, HTEX6, Rpa12, TCTEX6, TEX6, ZNRD1, ZR14, and A12.2. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish and chimpanzee species.