Other than hydrogen peroxide, which oxidants can oxidize ferrous ions into Fe(III)? How do they rank in terms of oxidation capacity? Are there any organic or endogenous oxidants present in the cell?
Bin Guo Dioxygen, superoxide, hydroxyl radicals, and other forms of organic peroxides, in addition to hydrogen peroxide, are organic oxidants that can convert Fe(II) ions to Fe(III). These oxidants have varying degrees of reactivity. Superoxide and hydroxyl radicals, which are formed during cellular metabolism, are endogenous oxidants involved in the oxidation of ferrous ions. The Fenton reaction, including ferrous ions and hydrogen peroxide, is an important endogenous activity. Endogenous oxidants and antioxidants interact with enzymes like catalase and superoxide dismutase to maintain cellular redox balance.
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