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[ccp4bb]: Protein/nucleic acid crystallization

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I'm chasing a condition from a sparse matrix screen for a protein/DNA 
complex. Things are going well but I'm worried about an unusually high 
spermine concentration. Complex crystals grow between 10mM and 15mM 

Does anyone have any experience of protein/nucleic acid crystals at this or 
even higher level of spermine?

As far as I can tell the spermine does not dissociate the complex and drops 
containing just the oligo do not have crystals.

Thanks in advance,

Rob Court

Robert Court

Structural Studies
MRC Laboratory of Molecular Biology
Hills Road

Tel. +44 (0)1223 402444
Fax. +44 (0)1223 213556