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Immunoblots showing the reaction of the MMP-1, MMP-2, MMP-3, and MMP-9 monoclonal antibodies with the proenzyme and activated forms of the corresponding MMPs. The membrane was immunostained with MMP-1 (A), MMP-2 (B), MMP-3 (C), and MMP-9 antibody (D). Lane 1 contained the proenzyme and lane 2 the activated form of the MMP corresponding to the monoclonal antibody used for the immunostaining. Molecular weight markers are shown on the right in kDa.
