Actually it probably would be better ask the supplier of your screen first how they got PEG 1K diluted to 12.5%. If they did hit it then you have to do the same. But even better idea is to order that PEG 1K from the same company that sells the screens. It will insure identical treatment.
My 2 cents. Vaheh ________________________________ From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of R.Srinivasan Sent: Wednesday, June 23, 2010 3:11 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] PEG 1000 Dear All, I have got initial crystals in a condition with PEG 1000. The PEG 1000 stock we had in our lab was rock solid and when i heated it to about 50 degrees for 15 to 20 minutes it became a solution. We thought the compound has got out dated or something like that and bought a brand new bottle from Sigma and this is rock solid too. Is this something characteristic of PEG1000? The hit condition says its 12.5% w/v PEG 1000 but it apparently seems i could never get a powder of it. So my question is, Can i go ahead using this melted solution form of PEG1000 for setting up optimizations? Thank you all in anticiaption, Vasan 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.