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F− induces UCP2 expression in rat maturation stage EO. Immunohistochemistry was performed on rat incisor sections stained with anti-UCP2 antibody. UCP2 protein increased in maturation stage ameloblasts (denoted by brackets) treated with F− (100 and 125 ppm). Bar = 10 μm. Lower panels were treated with pre-immune IgG primary antiserum as a negative control.
