Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-23 Thread Correy, Galen
bulletin board on behalf of Wiener, Michael C (mcw2s) Sent: Tuesday, 23 March 2021 8:56 AM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Fluka-branded PEG 3000 During a prior period of great concern about variable peroxidation levels of commercial PEGs (and of polyoxyethylene detergents), we

Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-23 Thread Wiener, Michael C (mcw2s)
CP4BB@JISCMAIL.AC.UK" Subject: Re: [ccp4bb] Fluka-branded PEG 3000 Hi Galen, Is it possibly the age of the original material, rather than the batch or brand? PEG does oxidise over time. Best, Dave -- Dr David C. Briggs Senior Laboratory Research Scientist Signalling and Structural B

Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-23 Thread David Briggs
From: CCP4 bulletin board on behalf of Correy, Galen Sent: Monday, March 22, 2021, 17:10 To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Fluka-branded PEG 3000 External Sender: Use caution. Dear all, I'm wondering if anyone could spare 50-100 g of Fluka branded PEG

Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-22 Thread Diana Tomchick
From: CCP4 bulletin board on behalf of Patrick Loll Sent: Monday, March 22, 2021 1:39 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Fluka-branded PEG 3000 EXTERNAL MAIL I don’t think we have any of that PEG lying around (sorry), but you might also consider

Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-22 Thread Fischmann, Thierry
Proprietary Commenting on Patrick’s message: (snip) might also consider that PEGs are notorious for impurities of various types; perhaps the Fluka reagent has less of an impurity that is particularly vexing for your specific protein. Of course, I suppose it might have more of a particular

Re: [ccp4bb] Fluka-branded PEG 3000

2021-03-22 Thread Patrick Loll
I don’t think we have any of that PEG lying around (sorry), but you might also consider that PEGs are notorious for impurities of various types; perhaps the Fluka reagent has less of an impurity that is particularly vexing for your specific protein. Of course, I suppose it might have more of a