2GX8:
reference: The 2.2 A resolution crystal structure of Bacillus cereus Nif3-family protein YqfO reveals a conserved dimetal-binding motif and a regulatory domain., Godsey MH, Minasov G, Shuvalova L, Brunzelle JS, Vorontsov II, Collart FR, Anderson WF, Protein Sci. 2007 Jul;16(7):1285-93. PMID: 17586767

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