I have had this experience many times.
My solution is to ensure that 'SE' is present in the 77-78th column of the line in the pdb file. Of course, the atom name SE is shifted one column to the left relative to CA.

Thanks Abhinav
j...@ssrl
Phone: (650) 926-2992 Fax: (650) 926-3292


Phil Evans wrote:
When Coot displays an MSE residue after refmac, it doesn't join up the Se atom to 
the atoms on either side (they appear as crosses). If I RS-refine it in coot, the 
bonds are drawn. Comparing MSE.cif from the refmac library & the Coot library, 
they are identical.

What's going on? Do other people see this?

Phil

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