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Representative immunohistochemical localization of endothelial nitric oxide synthase (eNOS) and caveolin-1 in serial sections of NFSe, NFEx, HFSe, and HFEx pig penes show staining in the vascular endothelium. Magnification 400×. NF = normal-fat diet; HF = high-fat diet; Se = sedentary; Ex = exercised; V = Vein; A = artery.
