I second that. Gently swirling the bottle (very important) before pipetting a few microliters (say 100 microliters or whatever).

Dialyse overnight vs 10 mM HEPES 2 mM MgCl2 ph7, then get the protein concentration to 10 mg/ml. Set up the drops (sitting drops) versus the same buffer with 30% (v/v) MPD. Direct cryo conditions. Depending on the material (plastic) used for the sitting drop trays you may find it difficult to get crystals out - you'll break up a few - but then no messing up to try to find cryo-conditions.

Fred.

On 04/02/13 17:27, Ganesh Natrajan wrote:
Hi David,

You could try the Glucose Isomerase supplied by Hampton. It crystallizes under a number of conditions, details of which you can find in their manual.


http://hamptonresearch.com/product_detail.aspx?cid=28&sid=56&pid=56

Ganesh

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Fred. Vellieux (B.Sc., Ph.D., hdr)
IBS / ELMA
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