3LVK:
reference: Structural basis for Fe-S cluster assembly and tRNA thiolation mediated by IscS protein-protein interactions., Shi R, Proteau A, Villarroya M, Moukadiri I, Zhang L, Trempe JF, Matte A, Armengod ME, Cygler M, PLoS Biol. 2010 Apr 13;8(4):e1000354. PMID: 20404999

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