Data Item _pdbx_refine_component.real_space_R_main_chain

General

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

Item Description

Real space R factor of electron density for each component, residue side chain, or main chain. The real space R factor is calculated by the equation R_real = [Sumi (|Dobs - Dcal|)]/[Sumi (|Dobs + Dcal|)] Where: Dobs is the observed electron density, Dcal is the calculated electron density, summation is for all the grid points Ref: Branden, C.I. & Jones, T.A. (1990). Nature, 343, 687-689

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]+)?