Dear all,

I am refining a multimer and mass spec data of the sample indicate that there is a mixture of two variants which differ in one amino acid residue. The density that we see is therefore most likely an average of both variants. I have created a pdb file with "alternate residues" each with 0.5 occupancy at this position to use it in refinement.  However, the programs detect this as an error in the pdb file.

Has anyone  faced such a problem previously? Any suggestions are very much appreciated.

Thanks a lot and best regards, Guenter

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