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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: J Am Chem Soc. 2020 Mar 17;142(13):6018–6029. doi: 10.1021/jacs.9b11454

Figure 6.

Figure 6.

Proposed mechanism for iron–sulfur cluster assembly on IscU. The primary route is highlighted in bold with additional secondary pathways shown as dashed lines. The proposed mechanism is based on the assumption that the resulting iron and sulfur bound species of IscU are a readout of intermediates on the IscU–IscS complex.