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Figure 2.
(a) 2F[o] – F[c] electron density map (blue) is shown for
ArgA332 and w201, and F[o] – F[c] map (red) is shown at the
position for the oxo (=O) group (omit map for the oxo) bound to
the molydenum atom. Maps are contoured at 2  and
4 ,
respectively. Hydrogen bonds between ArgA332 and water molecules
are shown as dotted lines. (b) Stereoviews of the active site
and putative proton-delivery channel in PsrA. The surface and
interior of the protein are shown in light and dark gray,
respectively. Crystallographic water molecules are shown as red
spheres.
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