Figure 1.

Immunohistochemical staining of EGFR (A), GEP100 (B), AMAP1 (C), and cortactin (D) in primary HNSCCs. Tissue sections were immunostained with antibodies against each target protein, as indicated. Positive staining of the proteins is shown in a reddish-brown color. The staining intensity of each protein in tumor cells was graded on a scale of 0–2, as described under Materials and methods. A representative figure for each staining is shown. Bars, 100 μm.