Antioxidants Binding Sites Cell Line, Tumor Diet polyphenol Docking Enzyme Inhibitors Flavonoid Flavonoids Humans IC 50 Inhibitory Concentration 50 Matrix Metalloproteinase 9 Models, Molecular Molecular dynamics Protein Binding Quercetin Structure-Activity Relationship Zymography article binding site chrysin controlled study drug mechanism drug protein binding drug structure enzyme active site enzyme inhibition enzyme kinetics fisetin galangin