Re: [ccp4bb] recipees for prep of test derivatives

2008-09-24 Thread Thomas Boesen
In our protein crystallography course, we succesfully used S-SAD phasing for proteinase K crystals diffracting to 1.58 Å (which is 'low' for these crystals) at our home source. I would highly recommend using proteinase K for heavy atom derivative demonstration purposes as it seems much easier to

Re: [ccp4bb] recipees for prep of test derivatives

2008-09-23 Thread Tim Gruene
what is it that you want to demonstrate? If it is just for structure solution, would S-SAD phasing be an option? That way all you need is a crystal, probably diffracting to better than, say, 2A. And a little bit of multiplicity. I assume this is feasible for Lysozyme whereas I don't know the

[ccp4bb] recipees for prep of test derivatives

2008-09-23 Thread Tommi Kajander
Hi, Could anyone give a more or less exact recipee for preparing a derivate for lysozyme or proteinase K? like what used, concentration and soak time. we'd need some data sets for a lab course only thing that really worked so far was lysozyem KI SIRAS (which however doesnt seem to be good en