Fig. 5: The omit map of the bound ligand in the SptF or mutant structures.

a SptF-Fe/αKG/1. b SptF-Fe/NOG/6. c SptF S114A-Fe/NOG/15. d SptF N65T-Fe/NOG/1. The Fo-Fc polder omit map of ligands are represented as a black mesh, contoured at +3.0 σ. Coloring scheme for ligands are the same as in Fig. 4.