Figure 3
The [4Fe–4S] clusters in the SLS data at (a, b) 7.36 keV and (c, d) 6.86 keV. The 2mFobs − DFcalc (blue, 1.0σ) and Fobs − DFcalc (green, 2.5σ) maps were calculated after ten cycles of restrained refinement in Refmac5. The coordinates of the [4Fe–4S] clusters were removed from the model prior to refinement. The [4Fe–4S] clusters are superposed as a reference for the original positions of Fe and S atoms in the clusters. |