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nNOS positive staining in obese Zucker rat kidney cortex and medulla. Panels 1 through 9: Zucker rat kidney stained immune-histochemically for nNOS; representative samples are shown from groups demonstrating statistically significant differences in staining. Panels 10 and 11 show representative Zucker rat kidney sections treated with non-immune serum (isotype control). M-medulla; C-cortex; 6 w- 6 weeks, 20 w- 20 weeks. Magnification: 200×, bar = 100μm.
