Re: [ccp4bb] O/T: microscopes

2008-12-17 Thread Jens T. Kaiser
ight source and better optics. > >> > >> Thanks, > >> Clint > >> > >> > >> Clint Spiegel > >> Assistant Professor, Chemistry > >> Western Washington University > >> 516 High Street > >> Bellingham, WA 98225-9150. -- +-+-+ | Dr. Jens T. Kaiser | Office: +1(626)395-2662 | | California Institute of Technology | Lab:+1(626)395-8392 | | m/c 114-96 | Cell: +1(626)379-1650 | | Pasadena, CA 91125, USA | Email: kai...@caltech.edu | +-+-+

Re: [ccp4bb] NCS and manual building

2008-11-28 Thread Jens T. Kaiser
MAIN does that for ages (n_molecules->generate_others). Also, the new COOT can do that (look in the - rather cluttered - treasure chest 'Extensions'->'NCS'->'Copy NCS chain') HTH -j. On Wednesday 26 November 2008 00:25:12 Prakash Rucktooa wrote: > Dear Olga, > > I have also encountered the sam

Re: [ccp4bb] soft white paraffin

2008-11-28 Thread Jens T. Kaiser
I switched to mineral oil (same as for pcr). You can apply it either with a 1mL pipet tip or with use a glass vial with the same diameter as the linbro wells as a stamp. This is much nicer as round cover slips do self-center and opening is gentler on the slips, too. HTH, Jens On Thursday 27 N

Re: [ccp4bb] X-Ray versus NMR Structure

2008-11-14 Thread Jens T. Kaiser
But there is a more fundamental difference. Crystallography determines the positions (more or less accurate) whereas NMR measures distances between certain atoms. NMR is local, 1-dimensinal information that -with enough data- can be used to generate a three dimensional model compatible with it,

Re: [ccp4bb] Non-sequential residue numbering?

2008-09-22 Thread Jens T. Kaiser
I have found the people at the pdb very helpfull and accomodating. I think the key point is to /discuss/ the issue with them instead of 'demanding' a certain way of deposition. The depositors may have their reasons for certain namings, but the pdb has its reasons too, often based on a much broad

Re: [ccp4bb] List of conserved waters

2008-08-29 Thread Jens T. Kaiser
I usually do that with a simple selection. it works in MAIN, CNS, RASMOL below syntax for RASMOL (because it comes w/ ccp4) assuming they are superimpsosed, waters have chain names W and X, respectivly, and your cutoff for conservedness(?) is 0.7A: select (water and *:W) and within(0.7,(wat

Re: [ccp4bb] Weakest protein-protein complex crystallised

2008-06-30 Thread Jens T. Kaiser
Dear Filip and others, To play Devils advocate, this could also (in the absence of strongly supportive biochemical data) be interpreted as a crystal artifact, with the weakly binding ligand not forming a physiologically relevant contact but merely occupying the - haphazardly - empty space in t

Re: [ccp4bb] mosflm / scala / cad question

2007-03-08 Thread Jens T Kaiser
You have to sort the mosflm files together. i.e in ccp4i>datareduction>sort/modify/combine you add both mtz files (with help of [add file] button. then you scale them in two runs in scala (run 1 1 to 36 run 2 38 to 180, in case that's not obvious). ccp4 uses (unfortunately) 'merging' in several

Re: [ccp4bb] MOSFLM question

2007-02-05 Thread Jens T Kaiser
Hi Anita, what I do in pathological cases is synchrotron postref beam 0 usebeam off I think usebeam off is not necessary. Like that the mosaicity is not refined at all. I think that's the only way. cheers, jens Anita Bentley wrote: Dear MOSFLM specialists, I am trying to treat rather diff

Re: crystal friendly solvents that are useful for dissolving hydrophobic small molecules?

2007-01-22 Thread Jens T Kaiser
Sarathy (and Todd) DMF is usually used for dimethyl formamide. From the name I have no idea what "dimethyl fluoride" may be (methylene difluoride, though wrong, is used for difluor methane,but that's not mixable with water, and only a liquid at low temperature ;-) ) Todd, If your protein has