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. 2014 Nov 11;2:98. doi: 10.3389/fchem.2014.00098

Figure 3.

Figure 3

Key steps of the mechanism of flavin-dependent tryptophan 7-halogenases. (A) Formation of FADHOOH, which oxidizes X to HOX. (B) Proposed formation of a lysine N-haloamine intermediate. (C) Electrophilic aromatic substitution of the substrate tryptophan.