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Figure 2.
Figure 2: Position of the CO molecule in state D. a, Electron
density map of F[obs](Mb**CO) - F[obs ](CO rebound) shows
positive (black, 4.2  )
and negative (grey, 5.2 )
electron density below the haem and at the position of bound CO,
respectively. b, Electron density maps of 2F[obs ]-[]F[calc]
(1.0 ).
The iron is below the haem plane; no electron density associated
with CO is seen at the distal side of the haem, but a new peak
interpreted as CO* appears below the haem. c, The CO-bound
complex obtained after briefly thawing the photorelaxed complex
shown in a, b.
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