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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Chem Soc Rev. 2010 May 20;39(8):2768–2779. doi: 10.1039/c003079c

Figure 2.

Figure 2

The inactive (resting state) diiron(III) site of MMOHox (left) is activated by two-electron reduction and a carboxylate shift of E243 to the diiron(II) state (MMOHred), which can then react with O2 in the presence of MMOB to form high-valent diiron-oxo species. Ball and stick structures of MMOHox and MMOHred adopted from D. A. Kopp, S. J. Lippard Curr. Opin. Chem. Biol. 2002, 6, 568-576.