1QOA:
reference: Iron-sulfur cluster cysteine-to-serine mutants of Anabaena -2Fe-2S- ferredoxin exhibit unexpected redox properties and are competent in electron transfer to ferredoxin:NADP+ reductase., Hurley JK, Weber-Main AM, Hodges AE, Stankovich MT, Benning MM, Holden HM, Cheng H, Xia B, Markley JL, Genzor C, Gomez-Moreno C, Hafezi R, Tollin G, Biochemistry 1997 Dec 9;36(49):15109-17. PMID: 9398238

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