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Immunostaining for macrophages. CD68 (A Left) and MAC-3 (B Left) staining for macrophages in two different and distinct plaques. As evident from the vessel wall, there is minimal background and staining is quite clean. CD68-stained (A Right) and MAC-3-stained (B Right) vessel wall areas that did not contain any atherosclerotic plaques. The CD68 staining was used to examine the relationship between macrophage content and MRI results by using immunomicelles.
