Re: [ccp4bb] fix atomic positions in REFMAC5

There is an option to do harmonic restraints: external harmonic chain [ch] residue [res] insertion [ins] atom [n] [altcode [a]] [sigma [value]] or external harmonic residues from [residue_number] [chain_name] to [residue_number] [chain_name] sigma [value] sigma 0.1 For example: exter

[ccp4bb] fix atomic positions in REFMAC5

Is there a possibility in refmac5 to fix atomic positions of some part of the molecule and to refine the other part? I couldn't find a proper keyword in keywords list:(