3-7-4--trihydroxyflavone has been researched along with galangin* in 1 studies
1 other study(ies) available for 3-7-4--trihydroxyflavone and galangin
| Article | Year |
|---|---|
Inhibitory effects of some flavonoids on the activity of mushroom tyrosinase.
Mushroom tyrosinase (EC 1.14.18.1) is a copper containing oxidase that catalyzes both the hydroxylation of tyrosine into o-diphenols and the oxidation of o-diphenols into o-quinones, and then forms brown or black pigments. In the present study, the effects of some flavonoids on the oxidation of L-3,4-dihydroxyphenylalanine (L-DOPA) have been studied. The results show that flavonoids can lead to reversible inhibition of the enzyme. A kinetic analysis showed that the flavonols are competitive inhibitors, whereas luteolin is an uncompetitive inhibitor. The rank order of inhibition was: quercetin > galangin > morin; fisetin > 3,7,4;-trihydroxyflavone; luteolin > apigenin > chrysin. Topics: Agaricales; Apigenin; Binding, Competitive; Catalysis; Copper; Dose-Response Relationship, Drug; Enzyme Inhibitors; Flavonoids; Flavonols; Kinetics; Luteolin; Models, Chemical; Molecular Structure; Monophenol Monooxygenase; Quercetin; Rutin; Structure-Activity Relationship | 2003 |