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Figure 4.
Figure 4 A stereoview of the hydrogen-bonding (dashed lines)
network connecting the active/catalytic site and the calcium
coordination sphere. The omit electron-density map shows the
five water molecules commonly found in the active site: the
structural water (W11), the two calcium-coordinated waters (W5
and W12), the catalytic water (W6) and the second water (W7).
Contours are shown at the 1.0  level.
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