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A: Immunohistochemical findings of IGF-IR in Chang liver cells. Chang liver cells showing positive-staining of IGF-IR in the cell membranes of the cells (SABC, original magnification × 100); B: Immunohistochemical findings of IGF-IR in HepG2 cells. HepG2 cells showing stronger positive-staining of IGF-IR in the cell membranes of the cells than that of Chang liver cells (SABC, original magnification× 100).
