Hi, As far as I can tell from the refmac documentation, the only way to change B-factor restraints for nearby atoms is by changing the weighting globally, using, e.g.,
========================== BFAC 1.0 1.5 2.0 3.0 4.5 ========================== Is there a way to implement a specific local b-factor restraint similarly to a distance restraint, i.e. ========================== exte dist first chain A resi 308 alte A atom N second chain A resi 308 alte D atom N value 0.0 sigma 0.02 type 1 ========================== becomes something like ========================== exte bfac first chain A resi 308 alte A atom N second chain A resi 308 alte D atom N value 0.0 sigma 10.0 type 1 ========================== such that the restraint can be imposed locally, between specific atoms? Thanks, Nick —————————————> Nicholas Pearce Post-doctoral Researcher Universiteit Utrecht