Data Item _reflns.pdbx_CC_half_anomalous

General

Item name
_reflns.pdbx_CC_half_anomalous
Category name
reflns
Attribute name
pdbx_CC_half_anomalous
Required in PDB entries
no
Used in current PDB entries
Yes, in about 0.02 % of entries

Item Description

The overall correlation coefficient between two randomly chosen half-sets of anomalous intensity differences, I(+)-I(-) for anomalous data within the sphere defined by the diffraction limits (_reflns.d_resolution_high and _reflns.d_resolution_low), i.e. data for which intensities for both instances of a Friedel pair are available for an acentric reflection.

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]+)?

Allowed Boundary Conditions

Minimum Value Maximum Value
-1.0 1.0

Aliases

Alias Item Name Dictionary Name Dictionary Version
_reflns.gphl_CC_half_anomalous gphl-proc-anomalous-stats-extension.dic 0.0