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Figure 2 Gelatin zymograms of gelatinase activity in the left atrium of control and heart failure (HF) animals. (Upper panels) Early HF. (Lower panels) Severe HF. On the left panels, lanes 1 to 4 represent controls, and lanes 5 to 8 are HF. In early HF, pro- and active matrix metalloproteinases (MMP)-9 are increased, while MMP-2 activity is not significantly changed. In severe HF, pro- and active MMP-2 are significantly increased, while MMP-9 activity is not significantly changed. The corresponding densitometry is shown in the right panels. *p < 0.05 versus respective controls.
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