Data Item _refine.ls_percent_reflns_R_free
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General 
- Item name
- _refine.ls_percent_reflns_R_free
- Category name
- refine
- Attribute name
- ls_percent_reflns_R_free
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 78.8 % of entries
Item Description
The number of reflections that satisfy the resolution limits
established by _refine.ls_d_res_high and _refine.ls_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 resolution limits.
Additional Descriptive Information for Depositors
The percent of reflections that satisfy both resolution limits and observation criterion, and that were pre-allocated as the cross-validation test reflections. These data were not used in the structure solution and refinement process and were used to calculate the 'free' R factor. In percentage to the overall reflections used for refinement.
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]+)?
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 1 | 12 |