Anti-PQBP3 antibodies are protein reagents that detect specific antigens. The PQBP3 antigen is another term for the human protein nucleolar protein 7, encoded by the NOL7 gene. The protein is known to be a part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. Canonically, it has an amino acid length of 257 residues and a mass of 29.4 kilodaltons. Its subcellular localization is in the nucleus and it is reported to be expressed in numerous tissues.