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. Author manuscript; available in PMC: 2009 Aug 3.
Published in final edited form as: Acc Chem Res. 2007 Jun 14;40(7):475–483. doi: 10.1021/ar700052v

FIGURE 4.

FIGURE 4

X-ray crystal structure of the intermediates of the HPCD reaction cycle. PDB files: E (1F1X), ES (1Q0C), other intermediates (2IGA). Inset: The aromatic ring of 4NC becomes progressively less planar as the E-semiquinone-superoxo and the alkylperoxo intermediates form.14 The rightmost structure is the oxidized H200E mutant complex (unpublished data).