Anti-Ki-67 antibodies are used in applications such as immunohistochemistry, flow cytometry, western blot, immunocytochemistry and ELISA to target the Ki-67 antigen. Ki-67 is a reported alias name for the human gene MKI67, or 'marker of proliferation Ki-67'. The 3256-amino acid protein has a reported mass of 358,694 daltons. The cellular localization is predicted to be nuclear. The Ki-67 antigen is a documented cancer marker.