Figure 2From: CD133-positive hepatocellular carcinoma in an area endemic for hepatitis B virus infection Immunohistochemistry analysis of CD133 expression in HCCs. CD133 was detected by avidin-biotin immunoperoxidase method. Nuclei were counterstained by hematoxylin. Original magnification, 400×. Two HCC samples negative for CD133 expression served as negative controls (bottom panel).Back to article page