Re: [ccp4bb] PCB buffer and MMT buffer

2007-01-31 Thread Nadir T. Mrabet
Hi all, I only wish to draw your attention to the fact that the Henderson-Hasselbach equation (as used in the paper you cite) is only valid if you use zwitterionic buffers. Otherwise, with other buffers, especially phosphate and multi-acids (e.g. succinate, citrate and so on), any calculation

Re: [ccp4bb] PCB buffer and MMT buffer

2007-01-30 Thread Lesley Haire
Hi, These buffers are available from Molecular Dimensions Ltd. and Jena Biosciences. Regards Lesley -Original Message- From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] Behalf Of Jenny Sent: 30 January 2007 04:20 To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] PCB buffer and MMT buffer Hi

Re: [ccp4bb] PCB buffer and MMT buffer

2007-01-30 Thread Jose M de Pereda
Hi Jenny (and others), The buffer systems used in the PACT screen are described in the following paper by Janet Newman. /Acta Cryst./ (2004). D*60*, 610-612[ doi:10.1107/S0907444903029640 ] Novel buffer systems for macromolecular crystallizat

[ccp4bb] PCB buffer and MMT buffer

2007-01-29 Thread Jenny
Hi, Sorry to bother you all.I'm going to try to reproduce some results from the initial screening from PACT kit.The conditions are something like 0.1M PCB buffer, 25% w/v PEG 1500 and 0.1 MMT buffer, 25%w/v PEG 1500. I was just wondering is there any easy way to get these buffers?Do you happen to