Figure 4
The hydrogen-bond network consisted of His88 and water molecules. The |Fo| - |Fc| difference neutron scattering length density map was calculated omitting His88 and water molecules (contoured at 2.5[sigma]). The hydrogen bonds are indicated as dashed yellow lines. The residue names of subunit A are shown in grey and those of D are in magenta. Unexchangeable H atoms are not displayed.  [article HTML]