Structure of the diiron site

Figure 11 (a) Protein backbone tracing of the D. vulgaris Rbr head-to-taiT homodimer viewed along its twofold rotation axis drawn using RASMOL and coordinates from IRYT in the Protein Data Bank. Amino (N) and carboxyl (C) termini are labeled, iron atoms are represented as spheres, and dashed lines indicate subunit interface regions between the [Fe(SCys)4] and diiron sites, (b) Schematic structures of the diiron sites and submit interfaces from the all-ferric and all-ferrons Rbr X-ray crystal strucmres. (Reprinted with permission from Refs. 68 69. 2002 2003 American Chemical Society)... 

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