Clone C33 has been reported to be a mouse monoclonal antibody specific to the human gene, CD82, or CD82 molecule. Other suppliers describe clone C33 to be a mouse monoclonal antibody against human CASP3, or caspase 3. Indicated applications for antibody clone C33 include Western blot, immunohistochemistry, flow cytometry, immunofluorescence, immunocytochemistry, and immunoprecipitation.