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Figure 5.
FIG. 5. A, superimposition of the overall structure in
three crystal forms: native crystal (colored as blue), nickel
complex (colored as red), and manganese complex (colored as
green). The figure is shown in stereo diagram. Bound metals/ions
are represented as a sphere model using the same color schemes
as the corresponding protein backbones. B, superimposition of
the active site residues in three crystal forms: native crystal
(colored as blue), nickel complex (colored as red), and
manganese complex (colored as green). The figure is shown in
stereo diagram. Bound metals/ions are represented as a sphere
model. Three residues in the native crystal form (His-120,
Thr-121, and His-122) are individually labeled in blue. Three
arrows in the figure indicate the conformation change of these
three residues between native crystal structure and complex
structures.
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