BGN and breast cancer: For instance, the Human Protein Atlas database [15] has two antibodies validated against BGN to be used in immunohistochemistry: HPA003157 (Sigma, Aldrich), a polyclonal antibody that targets 140 amino acids, and H00000633-M01 (Abnova, Taipei, Taiwan), and a monoclonal antibody against the full sequence of BGN (368 amino acids); the protein expression of BGN in breast cancer is different between these two antibodies.