[nosy] The one that your crystal likes less. I guess that's the idea of this screen, isn't it? [/nosy]
Their product http://hamptonresearch.com/documents/product/0000000030-0000000221.pdf description dedicate a full paragraph to 2,3 Butanediol. Tim On Wed, Mar 24, 2010 at 02:27:37PM -0400, Oganesyan, Vaheh wrote: > Hampton's CryoPro has two 2,3-Butanediols: ## 25 and 26. > So, which one is not the right one for cryo-preservation? > > > > Vaheh > > -----Original Message----- > From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of Leiman > Petr > Sent: Wednesday, March 24, 2010 12:37 PM > To: CCP4BB@JISCMAIL.AC.UK > Subject: Re: [ccp4bb] Butandiol as Cryoprotectant 2. > > > > > thanks so far for sharing your experience with Butanediol. But is it > > important to use a specific enantiomer ? Are you all only using 2R3R- > > Butanediol which is quite expensive ? > > Sigma Cat. # 18970 > 2,3-Butanediol puriss., mixture of racemic and meso forms, ≥99.0% (GC) > (Fluka) > works well and freezes clear. > And it's cheap! > > We've used it recently to collect 1.6 A resolution data from a crystal with > 2000+ residues in the asymmetric unit. > > Petr > > > > > > To the extent this electronic communication or any of its attachments contain > information that is not in the public domain, such information is considered > by MedImmune to be confidential and proprietary. This communication is > expected to be read and/or used only by the individual(s) for whom it is > intended. If you have received this electronic communication in error, > please reply to the sender advising of the error in transmission and delete > the original message and any accompanying documents from your system > immediately, without copying, reviewing or otherwise using them for any > purpose. Thank you for your cooperation. -- -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A
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