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. Author manuscript; available in PMC: 2022 Mar 1.
Published in final edited form as: Chem Soc Rev. 2021 Mar 1;50(4):2486–2539. doi: 10.1039/d0cs01297a

Figure 29.

Figure 29.

XRD structures of SiRA: (A) dehydrated form of SO32− substrate (SO2) (PDB ID: 4RKM), (B) photoreduced structure with SO bound to heme (PDB ID: 4RKM), (C) Cu-depleted form with SO32− bound to heme (PDB ID: 4RKN). (D) Proposed mechanism of sulfite reduction, based on these structures. Figure adapted from ref. 285 Copyright Springer Nature 2015.