[ccp4bb] Br-dU in Phenix refinement

nucleotide in coot, the hydrogen always falls apart.   Is there anyone encounter the similar problems or know how to deal with them?   Many thanks! Cui sheng  

[ccp4bb] gfp problem

Dear all: We have an unrefinable protein complex structure with one of the component is just a gfp. The space group shows as a P6122, a notorious space group for twining. But I could not detect any sign of twinnig using various of softwares. The R_free traps currently at 0.34 and no more space