Immunohistochemical staining results for Nrf2, NQO1 and Mrp1 expression in cancer tissuess.

<p>The unstained tissue slides from small cell lung cancer, gastric cancer, breast cancer and colon cancer were subject to HE staining (a1 to h1) and IHC staining with antibodies against Nrf2 (a2 to h2), Mrp1 (a3 to h3) and NQO1 (a4 to h4). The bar scales were labeled at the lower right corner of each pictures.