Figure 3

Gelatin zymography of MMPs from dentin extracts with or without PA pre-treatment. The relative molecular masses of MMP-2 and MMP-9, expressed in kDa, are presented in Std lane. After pre-treatment, gelatinolytic bands produced by MMP-2 and MMP-9 were visible only in the untreated group. CHX, chlorhexidine; MMP, matrix metalloproteinase; PA, proanthocyanidin.