Figure 2. Ellagic acid directly bound to MMP-2 protein as demonstrated by the change of UV absorption.

A. The spectral absorptions of 10 µM EA and 0.2 ng MMP-2 were measured at 260, 280, 405, 450 and 490 nm. B. The spectral absorptions at 280 nm for EA ranged from 0.5–10 µM in the absence or presence of MMP-2 protein were measured.