Figure 2. Photomicrographs of immunohistochemical evaluation for iNOS in the thoracic aorta in animals of groups R2 (A), R6 (B), and controls (C), with little marking endothelial (→) and muscle (M), adventitia (Ad) 400, and evaluation of eNOS. Diffuse expression in the endothelial layer (→), muscle (M), and adventitia (Ad) in the control group (F) with time-dependent decrease in groups R2 (D) and R6 (E) 400.