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. Author manuscript; available in PMC: 2011 Jun 30.
Published in final edited form as: J Am Chem Soc. 2010 Jun 30;132(25):8610–8617. doi: 10.1021/ja910844n

Figure 6.

Figure 6

Anomalous difference maps (4σ) for the C96RIDC-14 structures grown in the presence of equimolar Cu2+ and Zn2+ obtained at the Zn (a) or Cu (b) K edges. As expected, the heme Fe centers show anomalous signals at both wavelengths, whereas the core metal sites do the same only at the higher energy Zn edge, unambiguously identifying them as Zn ions. (c) X-ray fluorescence excitation scans of the same crystal – which was thoroughly washed with non-metal containing solutions – indicate the presence of both Zn and Cu.