Dear Fulvio,
what did your L-Test with the unmerged (P1) data look like? In order to
use twin refinement you should be sure that the structure is twinned.
Did you try all possible subgroups of R3? Generally, a triplet can be
treated as any other pseudo-merohedral twin, given it really is a
trip
Dear ccp4 users,
I have a reflections file obtained from a crystal initially scaled
in H3. All the attempts to phase by Molecular Replacement were not
successful and I succeeded only in P1. Based on previously solved
structures from the same protein, I suspected that twinning affected
crys
