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Rigid-body docking (dots) and interface refinement (open circles) of FNR mutants and Fd. (A) FNR K72E docking: distance between FAD and S2Fe2 cofactors vs. energy. The docking conformation closest to the Anabaena complex (RMSD 2.3 Å) is shown as a gray closed circle. (B) FNR K75E docking: distance between FAD and S2Fe2 cofactors vs. energy. The docking conformation closest to the Anabaena complex (RMSD 4.8 Å) is shown as a gray closed circle.
