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Imunofluorescence detection of iNOS (A) in endothelium-intact aortic rings from control and (B) paraquat-poisoned animals. Immunostaining for iNOS is shown only in endothelial cells (arrows) of vessels from paraquat-poisoned animals. (C) Graphical representation of the relative iNOS fluorescence intensity in endothelial cells. Images are representative of five animals for each group. ***p<0.001.
