Re: [ccp4bb] Question about cryoprotectant

2007-04-03 Thread mjvdwoerd
L PROTECTED] To: CCP4BB@JISCMAIL.AC.UK Sent: Tue, 3 Apr 2007 3:11 AM Subject: [ccp4bb] Question about cryoprotectant Hi, l have a crystal grow at condition screen l 40: 0.1M tri-sodium citrate dihydrate pH5.6 isoproponal 20%PEG4k 20% and the crystal need a cryoprotectant, we have used th

Re: [ccp4bb] Question about cryoprotectant

2007-04-03 Thread artem
Dear Yang Li, Cryoprotection of crystals is not an exact predictive science - you have to try a number of things, and in the worst case scenario, none of the stuff you try may work out. Assuming that your crystals are OK to start with (capillary mounted room temp. pattern would confirm that), you

[ccp4bb] Question about cryoprotectant

2007-04-03 Thread yang li
Hi, l have a crystal grow at condition screen l 40: 0.1M tri-sodium citrate dihydrate pH5.6 isoproponal 20%PEG4k 20% and the crystal need a cryoprotectant, we have used the 30% glycerol but it is not good, the mosaicity of the diffraction pattern is a little high, so anyone knows which is the be