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Die Quercetin‐2,4‐Dioxygenase (Quercetinase) von Streptomyces nutzt Nickel als Kofaktor, um die oxidative Spaltung des Flavonols Quercetin zu katalysieren. Wie dieses ungewöhnliche Metall im aktiven Zentrum die Katalyse und Sauerstoffaktivierung unterstützt, ist unklar. Wir stellen Kristallstrukturen der Ni‐Quercetinase in drei verschiedenen Zuständen vor, die direkte Einblicke geben, wie Quercetin...
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