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Figure 4
The intermediates in the reaction of haem peroxidases. The structures determined by NPX are circled. (a) The ferric (resting) enzyme from cytochrome c peroxidase, (b) compound I of cytochrome c peroxidase, (c) compound II of ascorbate peroxidase. The radicals on the porphyrin in the case of ascorbate peroxidase and on a tryptophan residue in the case of cytochrome c peroxidase are shown as [{\rm P}^{{\bullet}+}] and [{\rm Trp}^{{\bullet}+}], respectively. The red crosses show alternative structures eliminated by NPX.

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ISSN: 2059-7983
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