Anti-polymerase (RNA) II subunit J3 antibodies enable researchers to detect and measure the polymerase (RNA) II subunit J3 antigen in biological samples. This target is a reported synonym of the POLR2J3 gene, which encodes RNA polymerase II subunit J3. The human version of polymerase (RNA) II subunit J3 has a canonical amino acid length of 115 residues and a protein mass of 13.1 kilodaltons. It is reported to be localized in the nucleus of cells. polymerase (RNA) II subunit J3 is a member of the Archaeal Rpo11/eukaryotic RPB11/RPC19 RNA polymerase subunit protein family.