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
- Used in current PDB entries
- Yes, in about 10.3 % 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 (i.e., excluded from refinement) reflections when
refinement included calculation of a "free" R factor,
expressed as a percentage of the number of geometrically
observable reflection that satisfy the reflection limits.
Additional Descriptive Information for Depositors
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 (i.e., excluded
from refinement) reflections when refinement included
calculation of a "free" R-factor, expressed as
a percentage of the number of geometrically observable
reflection that satisfy the reflection limits.
Additional Item Example for Depositors
10.61
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]+)?