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Figure 7 Effect of 8 days (n = 5) and 15 days of exercise (n = 5) on eNOS-protein expression in (A) aortic rings and (B) left ventricular myocardium of singularized sedentary mice (n = 5 for each exercise period). Although exercise induced a significant and time-dependent upregulation of eNOS protein expression in aortic rings (p = 0.0147, analysis of variance), there was only a trend in left ventricular myocardium (p = 0.1637). Subsequent Newman-Keuls multiple comparison test of the data depicted in A revealed a significant difference only for the comparison sedentary versus 15 days' exercise as indicated (*, p < 0.05, analysis of variance).