Figure 9.

(a) Normalized Cu K-edge XANES spectra of control bacteria, bacteria grown in a Cu supplemented medium (Cu-bacteria) and magnetosomes isolated from Cu-bacteria (Cu-magnetosomes). (b) Cu K-edge XANES spectra of Cu-bacteria and control together with two Cu standards: ${\text{Cu}}_2\text{O}$ (${\text{Cu}}^{1+}$) and ${\text{Cu(OH)}}_2$ (${\text{Cu}}^{2+}$). (c) Cu-bacteria compared with CuS. d) Cu-magnetosomes compared with Cu ferrite (${\text{CuFe}}_2{\text{O}}_4$) and azurite (${\text{Cu}}_3{({\text{CO}}_3)}_2{(\text{OH})}_2$).