Data Item _refine_ls_shell.percent_reflns_R_free
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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]+)?