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. Author manuscript; available in PMC: 2012 Jan 3.
Published in final edited form as: Angew Chem Int Ed Engl. 2011 Jan 3;50(1):272–275. doi: 10.1002/anie.201005145

Figure 1.

Figure 1

FeMo-co showing the position and potential steric influence of the α-70 residue over the Fe 6 atom on the Fe 2, 3, 6, 7 face. (a) Side view of α-70Val. (b) Side view of α-70Ile. (c) End view of (left to right) α-70Val, α-70Ile, α-70Ala, α-70Gly. The wireframe indicates the van der Waals radii of the sidechains. A CO molecule is included for size comparison. Fe, rust; Mo, magneta; S, yellow; C, dark gray; O, red; X, blue. Structures built from PDB files: 1M1N.pdb [3] and 3K1A.pdb [13]