Hi Rui,

I would  try the additive screen.
http://hamptonresearch.com/product_detail.aspx?cid=1&sid=36&pid=27

Best Regards,
Georg


rui schrieb:
Hi, All,

I'm trying to crystallize a soluble protein and got something like granular, they are rounded shaped and not so regular and also don't have sharp edges. See the attached pic. The current condition is PEG4000 and pH around 5. How can I improve this condition? Thanks a lot.


--
Universität Tübingen
Interfakultäres Institut für Biochemie
Dr. Georg Zocher
Hoppe-Seyler-Str. 4
72076 Tuebingen
Germany

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Mail: georg.zoc...@uni-tuebingen.de
http://www.ifib.uni-tuebingen.de

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