1B0V:
reference: Alteration of the reduction potential of the [4Fe-4S](2+/+) cluster of Azotobacter vinelandii ferredoxin I., Chen K, Tilley GJ, Sridhar V, Prasad GS, Stout CD, Armstrong FA, Burgess BK, J Biol Chem 1999 Dec 17;274(51):36479-87. PMID: 10593945

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