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Figure 3.
Figure 3. The 2F[obs] -F[calc] electron density maps at the
retinal, Asp85, Asp212 and water 402 for (a) an illuminated
crystal and (b) a non-illuminated crystal. As in Figure 2, the
two conformations, for the BR and M[1] states are indicated with
green and gray colors. The retinal Schiff base is labeled as NZ.
In (a) the hydrogen-bonds (in blue) are for the M[1] state, in
(b) they are (in yellow) for the BR state. The Figure was
prepared with the graphics program Setor.[60]
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