Re: [ccp4bb] cryosolvent

2009-09-19 Thread Elspeth Garman
That is a heavy PEG, and they arent such good cryo-agents. If you get ice-rings when you test your buffer aone, try adding 15% of a much lighter PEG (400 or 600). Happy cryo-cooling Elspeth Roger Rowlett wrote: With that much PEG in your mother liquor, I don't think you will need any cryosolve

Re: [ccp4bb] cryosolvent

2009-09-19 Thread Roger Rowlett
With that much PEG in your mother liquor, I don't think you will need any cryosolvent. It will likely vitrify adequately in LN2 directly from this solution. In solutions that do not contain high concentrations of PEG or polyols, 25-30% glucose is nearly always sufficient, and is compatible with

Re: [ccp4bb] I compressed my images by ~ a factor of two, and they load and process in mosflm faster

2009-09-19 Thread Kay Diederichs
James Holton schrieb: ... In any case, I think it is important to remember that there are good reasons for leaving image file formats uncompressed. Probably the most important is the activation barrier to new authors writing new programs that read them. "fread()" is one thing, but finding the

Re: [ccp4bb] Format issue with TLSIN/TLSOUT files - probably explains some refmac problems

2009-09-19 Thread George M. Sheldrick
There is another (at least partial) solution to this problem. It is possible to write a routine to read a line in a free format in which, in addition to items being separated by 'white space' and possibly commas etc., it is also assumed that a minus sign cannot occur in the middle of a number s