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. Author manuscript; available in PMC: 2018 Mar 20.
Published in final edited form as: J Am Chem Soc. 2018 Jan 22;140(4):1294–1304. doi: 10.1021/jacs.7b08261

Figure 5.

Figure 5

Crystal structure of 4EH1. (A) A large number of Zn2+ ions are observed, all at partial occupancy. (B) and (C) depict in grey and orange, respectively, two alternatively occupied Zn2+ complexes observed near the center of the bundle. They resemble the tetranuclear and mononuclear clusters shown in Figures 3 and 4, respectively. The same arrangement was observed in the other crystallographically distinct 4-helix bundle in the structure of 4EH1. (D) and (E) depict partially occupied Zn2+ ions, observed at the periphery of the bundle.