[ccp4bb] Slightly off-topic - silica based columns

[Dr. Mark Mayer]

Slightly off-topic - but  these days most crystallographers are 
interested in protein purification.

What experience do people have with silica based columns for size 
exclusion chromatography. We are interested in resolution, stability, 
column life time, and ease of cleaning column compared to Superdex 
and Superose columns. Please describe specific columns if you can.

Thanks

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Mark Mayer