Figure 6
From: New insights into the mechanism of nickel superoxide degradation from studies of model peptides
Proposed mechanism of the first half-reaction of superoxide degradation by NiSOD and peptide-based model system. Possible proton sources are highlighted (step II) whether a pre-oriented imidazole (towards Ni(II)) is present (indicated in blue) or not (indicated in red), indicating two superoxide degradation pathways with a significantly lower performance for the model peptides and His1-deficient NiSOD mutants, which lack the pre-oriented imidazole moiety (color code according to Fig. 5).
