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Gelatin Zymography in OSCC cells before and after treatment with TGF-β1. a TGF-β1 mediates the activities of MMP-9 in both SCC25 and Tca8113 cells, while the activity of MMP-2 is also increased in HN5 cells. b The intensity of bands shown in the zymograph is converted to the figure using semi-quantitative histodensitometry analysis. The results are averaged in three independent experiments
