Anti-polymerase (RNA) III subunit H antibodies enable researchers to detect and measure the polymerase (RNA) III subunit H antigen in biological samples. This target is a reported synonym of the POLR3H gene, which encodes RNA polymerase III subunit H. This protein is known to function in innate immune responses, among other biological roles. The human version of polymerase (RNA) III subunit H has a canonical amino acid length of 204 residues and a protein mass of 22.9 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus of cells and widely expressed in many tissue types. polymerase (RNA) III subunit H is a member of the Eukaryotic RPB7/RPC8 RNA polymerase subunit protein family.