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Figure 2: Endothelium-dependent relaxation in rat aortae in the presence of pyrogallol (P). Cumulative concentration-response curves to ACh in the absence (control) or presence of pyrogallol with varying concentrations of α-tocopherol (a), α-tocotrienol (b), δ-tocotrienol (c), and γ-tocotrienols (d). Data is expressed as mean ± SEM. *Significantly different to control . #Significantly different to pyrogallol Sidak’s multiple comparison test.