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Immunohistochemical detection of hMGMT in liver. Cells expressing hMGMT are characterized by brown nuclei. (A) Nontransgenic liver. (B) LC22I liver. (C) LC26I liver. (D) Area of normal and tumor tissue from an LC28I animal. (Magnification: A and B, ×40; C, ×40; D, ×16.)
