[ccp4bb] model loop with alternate conformations..

[Karthikeyan S.]

Dear All,

We have a tetrameric structure solved at 2.3A resolution. In one 
molecule of the tetramer, a loop of 10 amino acids length, has two 
conformations with 6-8A distance with each other with occupance of ~0.5 
each (something  like one is closed and other is open conformation). How 
to represent this two alternate conformations in the PDB record and how 
to refine with refmac?

Thanks for your kind help

With regards
Karthik