Protein Data Bank exchange dictionary (pdbx) version 1.017

_reflns.threshold_expression

Name:
'_reflns.threshold_expression'

Definition:

   The threshold, usually based on multiples of u(I), u(F^2^)
   or u(F), that serves to identify significantly intense
   reflections, the number of which is given by _reflns.number_gt.
   These reflections are used in the calculation of
   _refine.ls_R_factor_gt.

Example:

I>2u(I)

Type: text

Mandatory item: no

Alias:
_reflns_threshold_expression (cif_core.dic version 2.3)

Related item: _reflns.observed_criterion (alternate)

Category: reflns