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Figure 1.
Figure 1: Position of the CO molecule in states A and B. a,
Electron-density map of F[obs](MbCO*) - F[obs](CO bound) shows
positive (black, 10  )
and negative (grey, 7 )
electron density at the position of CO* (B) and bound CO (A),
respectively. b, Electron density map of 2F[obs ]- F[calc] (1.0
)
of state B generated by photolysis. The iron is located below
the haem plane; the CO molecule is shown almost along its axis.
c, Electron density map of 2F[obs ]- F[calc] (1.0 )
of state A. The iron is in the haem plane; CO is bound almost
perpendicular to the haem plane.
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