Fibrin/fibrinogen staining of atherosclerotic lesions in 52-week-old apoE^−/− mice.

Left panel shows ascending aorta; right panel shows distal common carotid artery. Fibrin/fibrinogen, identified by red staining, is more extensive at the carotid bifurcation than the aortic arch. M indicates media; IEL, internal elastic lamina; P, plaque.