Figure 4. Representative images of zymography. Suppressive effects of L-carnitine (A), erythritol (B) or betaine (C) at 2-20 mM on protein production and enzymatic activity of gelatinases MMP-9 and MMP-2 were observed in primary HCECs exposed to hyperosmotic media (400-450 mOsM), evaluated by gelatin zymography.