Macromolecular dictionary (mmCIF) version 2.0.09

_phasing_MIR_shell.R_cullis

Name:
'_phasing_MIR_shell.R_cullis'

Definition:

   Residual factor R~cullis~ for centric reflections in this shell.

               sum| |Fph~obs~ +/- Fp~obs~| - Fh~calc~ |
   R~cullis~ = ----------------------------------------
                       sum|Fph~obs~ - Fp~obs~|

   Fp~obs~  = the observed structure-factor amplitude of the native
   Fph~obs~ = the observed structure-factor amplitude of the
              derivative
   Fh~calc~ = the calculated structure-factor amplitude from the
              heavy-atom model

   sum is taken over the specified reflections

   Ref: Cullis, A. F., Muirhead, H., Perutz, M. F., Rossmann, M. G.
        & North, A. C. T. (1961). Proc. R. Soc. London Ser. A,
        265, 15-38.

Type: float

Mandatory item: no

The permitted range is [0.0, infinity)

Category: phasing_MIR_shell