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This routine adds restraints to keep residues that have no defined topology
(generally BLK residues, used to transfer ligands directly from templates,
as described in Section 2.2.1) in a reasonable
conformation. You can override this method if you need to change these
By default, three sets of restraints are built:
- Intra-residue distances are all constrained to their template values.
This causes each residue to behave as a rigid body.
- Inter-residue distances are constrained to template values if these are
7Å or less. This has the effect of preserving multiple-HETATM
structures such as DNA chains.
distances are constrained to template values if
these are 10Å or less. This preserves ligand coordination.