A majority of suppliers have reported the clone 13H4 to be a monoclonal antibody specific to the human gene, AMACR, or Alpha-methylacyl-CoA racemase. Other suppliers describe clone 13H4 to be a monoclonal antibody against human CPB2, or carboxypeptidase B2. Indicated applications for antibody clone 13H4 include Western blot, immunohistochemistry, and ELISA.