Clone 9B9 has been reported to be a monoclonal antibody specific to the human gene, ACE, or Angiotensin I converting enzyme. Other suppliers describe clone 9B9 to be a monoclonal antibody against mouse TNFRSF13C, or tumor necrosis factor receptor superfamily, member 13c. Indicated applications for antibody clone 9B9 include Western blot, immunohistochemistry, flow cytometry, immunofluorescence, ELISA, immunocytochemistry, and immunoprecipitation.