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Evaluation of the levels of active MMPs in the culture soup of HCLE cells treated with PED patient tears and control tears. Gelatin zymogram showing the levels of MMP9 in controls and PED patient tears (A). The corresponding histogram showing the quantitative volumetric density of the bands, as detected in gelatin zymography (B). * Statistically significant according to t-test, p < 0.05, n = 3.
