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Figure 4 Sections of an infarcted segment 21 days after the surgery showing MMP-9 (A) and TIMP-1 (B) immunoreactivity. Parallel sections demonstrate collagen accumulation under direct (C) and under polarized light (D). Note dissociation between the areas that express MMP-9 (arrowheads) and the areas that express TIMP-1 (arrow) and are rich in collagen (arrow). Scale bars represent 70 µm.
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