Immunohistochemical staining of RelA/p65 proteins in representative breast cancer tissue specimens.

<p><i>A</i>, RelA/p65 was weakly detected in normal breast epithelial cells and positive products were located in the cell cytoplasm. <i>B</i>, Staining for RelA/p65 was detected mainly in the cytoplasm in high differentiated tumors. <i>C</i>, Intense and distinctly granular staining for RelA/p65 was detected in stained nuclei of low differentiated tumor specimens. <i>D</i>, Tumor section evaluated without the primary antibody to serve as a negative control. Magnification 200x.