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l-Arg or l-Cit supplementation did not restore renal nephrin protein expression in diabetic mice. Kidney nephrin expression was detected using Western blot analysis at week 9 after STZ-induced diabetes. β-Actin was used as a loading control. Quantification was performed by densitometry followed by normalization to β-actin. Data are presented as means ± SE; n = 4–6 mice/group. *P < 0.05 compared with the normal group.
