Re: [ccp4bb] Protein precipitating at higher concentration!!

2015-01-09 Thread FOOS Nicolas
: CCP4BB@JISCMAIL.AC.UK Objet : Re: [ccp4bb] Protein precipitating at higher concentration!! Hi Ivan this will not be an answer to your question, but did you consider not concentrating 'too much' your sample? It happened few times to me that the protein was precipitating when concentrati

Re: [ccp4bb] Protein precipitating at higher concentration!!

2015-01-08 Thread CHAVAS Leonard
Hi Ivan this will not be an answer to your question, but did you consider not concentrating 'too much' your sample? It happened few times to me that the protein was precipitating when concentrating for SEC because of the presence of other impurities. Trying the good old AS precipitation helped

[ccp4bb] Protein precipitating at higher concentration!!

2015-01-08 Thread xaravich ivan
Hi Xtallographers, I have been able to purify a protein that was initially going into inclusion bodies from the excellent suggestions that I got here. So my lysis buffer has 0.5M Guanidium Hydrochoride, 2% TritonX-100, 500mM NaCl, 5% Glycerol in 20 mM Tris-HCL pH 8.0 The problem is that the prote