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Figure 5 Upper panel, Representative Western blot illustrating the effects of three-day NTG treatment of rabbits (continuous or 12 h patch on/patch off) on the expression of Cu/Zn SOD in aortic homogenates. Lower panel, Densitometric analyses of four similar Western blots. Continuous in vivo treatment with NTG for three days caused a significant decrease in protein expression of Cu/Zn SOD, which was almost completely normalized by the intermittent treatment. *p < 0.05 vs. control.