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. Author manuscript; available in PMC: 2013 Jun 24.
Published in final edited form as: Biochemistry. 2009 Apr 21;48(15):3354–3369. doi: 10.1021/bi802029t

Scheme 1.

Scheme 1

Proposed outer-sphere mechanism for NiSOD. Ni(III) is indicated by the His-on complex, while Ni(II) is denoted as a His-off complex, although removal of the His1 during turnover may not occur. Superoxide is denoted by the orange molecule and water is denoted by red spheres. Images were generated in PyMOL (75).