FIGURE 4. Proposed mechanism for the reaction catalysed by SyrB2.
From the following article:
Crystal structure of the non-haem iron halogenase SyrB2 in syringomycin biosynthesis
Leah C. Blasiak, Frédéric H. Vaillancourt, Christopher T. Walsh and Catherine L. Drennan
Nature 440, 368-371 (16 March 2006)
doi:10.1038/nature04544
See text for a description of the proposed steps. The crystallized form of SyrB2 is labelled A. The oxygen atom inserted into 
KG is shown in red.
