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Immunohistochemically stained cryosections of advanced atherosclerotic lesions. iPLA2 (A, D, and G, scale bar = 100 μm) colocalizes with the endothelial specific marker CD31 (B; merge C), the monocyte/macrophage specific marker MOMA-2 (E; merge F), and the smooth muscle–specific marker SM-actin (SMA, H; merge I). The insets show a high-power view of plaque foci with double-positive cells.
