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. Author manuscript; available in PMC: 2014 Jul 31.
Published in final edited form as: J Am Chem Soc. 2013 Jul 16;135(30):10.1021/ja403734n. doi: 10.1021/ja403734n

Figure 4.

Figure 4

Structures of the electron transfer units of RuH107NO2YO−109 (PDB 4HHG, 1.6 Å) (A); H126NO2YOH122 (PDB 4HIP, 1.9 Å) (B), and H124NO2YOH122 (PDB 4HHW, 2.0 Å) (C) azurins. The peptide chain connecting the Ru-label, NO2YOH, and azurin-Cu is shown in cyan and the rest of the protein is shown as a gray ribbon. The distances between redox centers (see text) are shown above the black bars; the bars are not intended to show angles between cofactors. The inset in (A) shows Lys122. The Lys122(N) to NO2YO(Ophenolate) distance is 4.3 Å. Cu2+ is depicted as an orange sphere and Ru2+ in (A) is a turquoise sphere.