Fig. 16. (A) A pentanuclear oxo-Hf(iv) cluster in the open interdomain cleft of bacterial transferrin (Fbp), bound to the protein by two tyrosinate side-chains, Tyr195 and Tyr196 (adapted from Alexeev et al., 2003).104 This cluster can also be capped by phosphate. (B) Trinuclear Fe3O4 oxo-iron cluster in Fe3–Fbp. The phenolate oxygen of Tyr196 is a central μ3-bridging oxygen and Tyr195 is monodentate (adapted from Zhu et al., 2003).105 (C) The ferrihydrite-like (Fe(O)OH) mineral core in the Fe(iii) storage protein ferritin. Part of the 24 subunit protein shell has been cut away to show the ferrihydrite inside. Courtesy of Allen D. Elster, https://MRIquestions.com.
