FIGURE 3.1 Schematic of hydrogen metabolism and the hydrogenase active site. (A) The cell of C. pasteurianum whose metabolism involves the oxidation of sugars and evolution of hydrogen by the iron-only hydrogenase designated as a hexagon. (B) The range of organisms that use hydrogen as a reductant and use the nickel-iron uptake hydrogenase. (C) Schematic of the iron-only hydrogenase enzyme showing paths for electron and proton transfer converging at the H center. (D) Schematic of the H center showing the six-iron cluster with a two-iron subcluster bound to five CO or CN ligands.

SOURCE: Adams, M.W.W. and E. I. Stiefel. 1998. Biological Hydrogen Production: Not So Elementary. Science 282(5395): 1842-1843.

From: 3, Fundamental Aspects of Bioinspired Chemistry for Energy

Cover of Bioinspired Chemistry for Energy
Bioinspired Chemistry for Energy: A Workshop Summary to the Chemical Sciences Roundtable.
National Research Council (US) Chemical Sciences Roundtable.
Washington (DC): National Academies Press (US); 2008.
Copyright © 2008, National Academy of Sciences.

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