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A Model System for Flavoenzyme Activity. - Binding of Flavin and Modulation of its Redox Potentials through Coordination to a Lewis-acidic Azamacrocyclic Zinc(II) Complex

König, B. ; Pelka, M. ; Reichenbach-Klinke, R. ; Schelter, J. ; Daub, J.



Abstract

The coordination of flavins to Lewis-acidic zinc(II)cyclen complexes, as a mimic for a metalloprotein binding site, changes their redox properties significantly. The coordination facilitates the electrochemical reduction of the flavin and stabilizes the flavinhydroquinone redox stage, so that a 600 mV more positive potential is necessary for reoxidation. Binding of flavin to the receptor molecule ...

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