Selective X-ray-induced NO photodissociation in haemoglobin crystals: evidence from a Raman-assisted crystallographic study

Merlino, A.; Fuchs, M.R.; Pica, A.; Balsamo, A.; Dworkowski, F.S.N.; Pompidor, G.; Mazzarella, L.; Vergara, A.

doi:10.1107/S0907444912042229

Figure 2
Difference Fourier electron-density maps (2F_o - F_c) of the [alpha]

₁ and

₁ haems of NO-HbTb and partially ligated forms (NO_x1-HbTb, NO_x2-HbTb and NO_x3-HbTb) at different X-ray doses (0.4, 4.0, 7.6 and 11.2 MGy, respectively). The maps were prepared using data at the same resolution (2.5 Å) and at the same electron-density level (1.0 [sigma]