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MMPs activity as determined by gelatin zymography. An intense band at Mr 72 000 was shown in the FBS (fetal bovine serum) and the conditioned medium of KKU-100, but not of the RMCCA-1 cells. The Mr 72 000 band in KKU-100 has previously been shown to correspond to MMP-2 activity in many cell lines[11,12].
