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
- Used in current PDB entries
- Yes, in about 76.2 % 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
(i.e. excluded from refinement) reflections when refinement
included calculation of a "free" R factor, espressed as a
percentage of the number of geometrically observable
reflections that satisfy the resolution limits.
Additional Descriptive Information for Depositors
The percentage of the number of reflections that satisfy the resolution and observation limits, and that were used for the calculation of a "free" R-factor.These reflections were excluded from the refinement but may be used to calculate the final R(obs) or R(all).
Additional Item Example for Depositors1
10
Additional Item Example for Depositors2
9
Data Type 
- Data type code
- float
- Data type detail
- int 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]+)?