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. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: Curr Opin Chem Biol. 2011 Apr 12;15(3):452–457. doi: 10.1016/j.cbpa.2011.03.014

Figure 2.

Figure 2

A2B2 protein designed to accommodate nonbiological cofactors (diphenyl Zn porphyrins) [27]. Protein comprises two distinct peptides (green, orange). Metal-coordinating His residue is rendered green.