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Figure 5.
Figure 5. AhpE surface in the vicinity of the active site.
(a) The oxidized AhpE structure, in which Cys45 forms a sulfenic
acid, Arg116 is directed away, and a large surface channel
approaches the active site. (b) Reduced AhpE, seen in molecule B
of the bromide-soaked structure, with Arg116 directed towards
Cys45 Sg, and no surface channel except for a deep, positively
charged cavity leading to Cys45.
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