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GPx-1 immunohistochemistry in pancreatic islets of mice at 4 and 20 wk of age. GPx-1 immunostaining was localized to the β-cells of transgenic, GPx(+) mice (B, C, F, and G). In contrast, no GPx-1 staining was observed in the β-cells of nontransgenic, GPx(−) mice (A, D, E, and H) (magnification, ×40).
