view article

Figure 8
Rotation-function likelihood. (a) The unit cell contains six symmetry-related molecules. For a given orientation of the search, the orientation but not the position of the six molecules is defined. Therefore, the amplitudes but not the phases of the six corresponding structure-factor contributions are defined. The atoms in the molecules have errors in their positions and scattering, indicated by the arrows and concentric circles, respectively. The molecule in the orientation giving the largest scattering is shown in magenta. (b) The largest model structure-factor contribution, Fbig, is given a phase α relative to the observed structure factor Fo, with the other model structure-factor contributions making a `random walk' around the end of this one phased structure-factor contribution. (c) The resulting probability distribution for Fo is a two-dimensional Gaussian centred on DFbig, shown with grey shading.

Journal logoBIOLOGICAL
ISSN: 1399-0047
Follow Acta Cryst. D
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds