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. Author manuscript; available in PMC: 2008 Jul 2.
Published in final edited form as: Biochemistry. 2007 Feb 27;46(12):3734–3744. doi: 10.1021/bi062214k

Figure 2.

Figure 2

A: Oxidation from G to Gh and Sp can occur sequentially via OG or in one step using a 4-eoxidant such as singlet oxygen. B: Oxidation of OG with one-electron oxidants leads to Gh and Sp.