Data Item _pdbx_refine_component.shift

General

Item name
_pdbx_refine_component.shift
Category name
pdbx_refine_component
Attribute name
shift
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

The tendency of the group of atoms (e.g. residue or ligand, side chain, main chain) to move away from its current position. Displacement of atoms from electron density is estimated from the difference (Fobs - Fcal) map. The displacement vector is the ratio of the gradient of difference density to the curvature. The amplitude of the displacement vector is an indicator of the positional error. Ref: Vaguine, A.A., Richelle, J. & Wodak, S.J. (1999). Acta Cryst. D55,199-205

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]+)?