Re: [ccp4bb] OT: Crystallisation compatible detergents

2009-03-24 Thread Annie Hassell
-0368 (FAX) annie.m.hass...@gsk.com "Darren Hart" Sent by: "CCP4 bulletin board" 24-Mar-2009 11:22 Please respond to "Darren Hart" To CCP4BB@JISCMAIL.AC.UK cc Subject [ccp4bb] OT: Crystallisation compatible detergents Hello, We can make a nice 1:1 complex

Re: [ccp4bb] OT: Crystallisation compatible detergents

2009-03-24 Thread Pascal Egea
Hi Darren I believe that the most frequently used detergent for protein crystallization (not including membrane proteins) is octyl-glucoside. The most important parameter is the CMC of the detergent and the size of the micelles of free detergent if you have micelles around. These considerations do

Re: [ccp4bb] OT: Crystallisation compatible detergents

2009-03-24 Thread Joyce, Gordon M.(NIH/NIAID) [F]
To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] OT: Crystallisation compatible detergents Hi Darren, I'm not aware of any (membrane) protein crystal structures solved with tween20. It's heterogeneous, and its color suggests it contains impurities and/or oxidation products, making it

Re: [ccp4bb] OT: Crystallisation compatible detergents

2009-03-24 Thread Van Den Berg, Bert
/24/2009 11:22 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] OT: Crystallisation compatible detergents Hello, We can make a nice 1:1 complex between two proteins that then gradually precipitates during storage at 4 degC. With 0.005% Tween-20 the complex is stable and does not preciptate noticeably.

[ccp4bb] OT: Crystallisation compatible detergents

2009-03-24 Thread Darren Hart
Hello, We can make a nice 1:1 complex between two proteins that then gradually precipitates during storage at 4 degC. With 0.005% Tween-20 the complex is stable and does not preciptate noticeably. We have used this in buffers to measure the kinetics of binding by Biacore so it is clearly compatible