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. Author manuscript; available in PMC: 2019 Apr 2.
Published in final edited form as: Methods Enzymol. 2018 Jul 24;606:1–71. doi: 10.1016/bs.mie.2018.06.004

Fig. 1.

Fig. 1.

(A) [Fe4-S4] binding motif from biotin synthase (PDB: 1R30). Image created using LigPlot+ (Laskowski & Swindells, 2011). (B) The common activation step associated with the canonical RSS.