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The mitochondrial protein frataxin is emerging as a novel mechanism to promote iron metabolism while also providing anti-oxidant protection. Recombinant frataxin proteins from different species are able to form large molecular assemblies that store Fe(III) as a stable mineral in vitro. Furthermore, monomeric and assembled forms of frataxin donate Fe(II) to the Fe–S cluster scaffold protein IscU, [3Fe–4S]...
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