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Figure 5 Immunostaining (serial sections) for MMP-9 (A), CD31 and vimentin (B), MMP-1 (C), alpha-smooth muscle actin and vimentin (D) showing absence of colocalization of MMPs in both endothelial cells and smooth muscle cells. Matrix metalloproteinases, endothelial cells, and smooth muscle cells are green; vimentin is red; and nuclei are blue. Abbreviations as in Figure 1.