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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Curr Opin Chem Biol. 2012 Mar 5;16(1-2):19–25. doi: 10.1016/j.cbpa.2012.02.012

Figure 1.

Figure 1

Nitrogenase proteins and cofactors. Shown are the Fe protein (left) and an αϐ-unit of the MoFe protein (right) along with two ATP molecules, the [4Fe-4S] cluster of the Fe protein, and the P cluster and the FeMo-cofactor of the MoFe protein. Atom colors are Fe in rust, S in yellow, C in gray, O in red, and Mo in purple. This figure was made using the computer program PyMol from the PDB file 2AFK.