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. Author manuscript; available in PMC: 2022 Jan 19.
Published in final edited form as: Biochemistry. 2021 Jul 15;60(46):3497–3506. doi: 10.1021/acs.biochem.1c00370

Figure 7:

Figure 7:

FeIV=O structure and FMOs. A. Schematic of FeIV=O intermediate with possible substrate orientations along (σ) and perpendicular (π) to the Fe-oxo bond. B. σ (black) and π (red) FMOs enabling HAA along (σ) and perpendicular to (π) the Fe-oxo bond. PE indicates promotion energy required to reach the dπ FMO. Adapted from [Srnec, M. et al. (2020) Nuclear Resonance Vibrational Spectroscopic Definition of the Facial Triad FeIV=O Intermediate in Taurine Dioxygenase: Evaluation of Structural Contributions to Hydrogen Atom Abstraction. Journal of the American Chemical Society 142, 18886–18896.] Copyright [2020].