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Stefano,
Rather than eliminate NaCl, you can address the problem by adding NaCl to your reservoir solution.

kmj

Stefano Benini wrote:
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Dear All,

I am trying to crystallise a protein that requires 1M NaCl in order to be happy in solution of about 15 mg/ml (actually with 1M NaCl I can go much higher than this).

This is influencing my crystallisation trials just because NaCl is highly hygroscopic

does any of you know which salt (possibly not higher than of 100-200mM) or wathever I could try to eliminate NaCl and the above mentioned problem?

thank you very much
best regards

Stefano

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