A, Representative western blot of NKA α1 (upper panel) and β-actin bottom panel is shown in membrane-enriched kidney cortex samples from WT and PPARα KO mice treated as vehicle (−) or with angiotensin II (+) infusion by osmotic minipump for 12 days. Gel was loaded with an equivalent amount of protein from each mouse kidney. B, density summary of NKA α1; and summary of NKA α1 densitometry (mean ± sem, n = 6/group); results of two-way ANOVA (genotype X treatment) displayed in graph insets. Significant effect (p < 0.05) shown in bold font. C, summary of Na+-K+ ATPase activity (mean ± sem, n = 6/group); results of two-way ANOVA (genotype X treatment). D, summary of NKA mRNA levels by qRT-PCR. Significant effect (p < 0.05) shown in bold font.