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Iron-sulfur cluster carriage. (A) Structure of the A-type carrier IscA from Thermosynechococcus elongatus (PDB accession number 1X0G) with a [2Fe-2S] cluster bound. (B) Structure of Nfu from Staphylococcus epidermidis (PDB accession number 1XHJ). The cysteine thiols that are proposed iron-sulfur cluster ligands are highlighted. (C) Schematic representation of iron-sulfur cluster scaffolds and carriers.
