Ribbon Model of an Enzyme with Cofactors and Inhibitor Bound

The Enzyme is a Cytochrome c Reductase showing its Cofactors - Heme-Iron (space-fill model on left) and Flavin Adenonine Dinucleotide or FAD (space fill model on right) with an ADP molecule (space fill model above FAD) bound in the electron donor site for which the substrate NADH for driving the reduction of cytochrome c. FAD is a natural derivative of vitamin b-2.

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©Wilbur H. Campbell, 1996; wcampbel@mtu.edu