1X0G:
reference: The Asymmetric IscA Homodimer with an Exposed [2Fe-2S] Cluster Suggests the Structural Basis of the Fe-S Cluster Biosynthetic Scaffold., Morimoto K, Yamashita E, Kondou Y, Lee SJ, Arisaka F, Tsukihara T, Nakai M, J Mol Biol. 2006 Jun 30;360(1):117-32. Epub 2006 May 15. PMID: 16730357

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