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The percent change in NOS enzymatic activity in afferent arterioles (as measured by enzymatic assay) in controls (●) and after treatment with ANG II (■), ANG II with candesartan (AT1X: ▲) or ANG II with PD 123319 (AT2X ◆). *P<0.05, vs. control (all ages); †P<0.05, vs. AT1X.
