Re: [ccp4bb] Organic solvents for ligand solubilisation

2013-05-23 Thread jens Preben Morth
Dear Klaus If your compound can be dried, you can add it to the drop as a powder from the tip of a acupuncture needle. At least this works for many of the insoluble heavy metal derivatives. We have also successfully resuspended the powder in the optimal buffer of choice and added it as insolub

Re: [ccp4bb] Organic solvents for ligand solubilisation

2013-05-23 Thread Bayliss, Richard (Dr.)
Dear Klaus, We've had a lot of luck with ethylene glycol and isopropanol, using them successfully in cases where DMSO affects diffraction. Best wishes Richard = Dr Richard Bayliss, Reader in Structural Biology Department of Biochemistry Henry Wellcome Building Univer

Re: [ccp4bb] Organic solvents for ligand solubilisation

2013-05-23 Thread Bosch, Juergen
Hi Klaus, - small molecular weight PEG's e.g. 200 instead of DMSO, has the advantage of also helping to cryo protect - Methanol (only for dispensing the compound into wells) then allow to evaporate and simply add your cryo-protected crystals, the hope is that sufficient of your ligand goes into

[ccp4bb] Organic solvents for ligand solubilisation

2013-05-23 Thread Klaus Fütterer
Dear CCP4BB followers, We are currently trying to obtain ligand-bound complexes for one of our proteins by soaking and/or co-crystallisation. We have had prior success for this protein, but using a different class of ligands. The new ligand (in DMSO) remains in solution (more or less) when mi