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. Author manuscript; available in PMC: 2012 Dec 21.
Published in final edited form as: J Am Chem Soc. 2011 Nov 29;133(50):20426–20434. doi: 10.1021/ja208384d

Figure 1.

Figure 1

Active site structures of a) [NiFe]-hydrogenase and b) bovine erythrocyte superoxide dismutaste demonstrating bridging cysteine or histidine (shown in blue) as found in metalloproteins.1,2