**Definition:**

The real-space residual RSR, as described by Branden & Jones (1990), evaluated over all atoms in the nucleic acid monomer. sum|p~obs~ - p~calc~| RSR = --------------------- sum|p~obs~ + p~calc~| p~obs~ = the density in an 'experimental' map p~calc~ = the density in a 'calculated' map sum is taken over the specified grid points Details of how these maps were calculated should be given in _struct_mon_details.RSR. The sums are taken over all map grid points near the relevant atoms. The radius for including grid points in the calculation should also be given in _struct_mon_details.RSR. Ref: Branden, C.-I. & Jones, T. A. (1990). Nature (London), 343, 687-689.

**Type:** float

**Mandatory item:** no

**Category:** struct_mon_nucl

Copyright © 2005 International Union of Crystallography