Data Item _refine_ls_shell.percent_reflns_R_free

General

Item name
_refine_ls_shell.percent_reflns_R_free
Category name
refine_ls_shell
Attribute name
percent_reflns_R_free
Required in PDB entries
no
Used in current PDB entries
Yes, in about 12.4 % of entries

Item Description

The number of reflections that satisfy the resolution limits established by _refine_ls_shell.d_res_high and _refine_ls_shell.d_res_low and the observation limit established by _reflns.observed_criterion, and that were used as the test reflections (i.e. were excluded from the refinement) when the refinement included the calculation of a 'free' R factor, expressed as a percentage of the number of geometrically observable reflections that satisfy the reflection limits.

Data Type

Data type code
float
Data type detail
float item types are the subset of numbers that are the floating numbers.
Primitive data type code
numb
Regular expression
-?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?