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. 2018 Feb 2;4:97. doi: 10.3389/fmolb.2017.00097

Figure 4.

Figure 4

Cross-linking experiments to identify the interacting sites on IscX and IscS using different relative concentrations of IscS and IscX. (A) Experiments using wild-type IscS (8 μM) and IscX at molar ratios 1:10, 1:7.5, 1:5, 1:2.5, and 1:1 from left to right. The last two lanes on the right are the controls carried out using isolated IscS and IscX. As expected the IscS dimer disassembles in SDS and runs as a monomer of ca. 45 kDa. (B) The same as in A but with the IscS_R220/223/225E mutant. (C) The same as in A but with the IscS_K101/105E mutant. The markers are indicated on the right.