Re: [ccp4bb] CCDs + Re: PILATUS data collection

2013-05-19 Thread Kay Diederichs
On Thu, 16 May 2013 18:25:35 +0100, Frank von Delft frank.vonde...@sgc.ox.ac.uk wrote: Dear Gerard - thanks, very informative! Two questions: 1. Do I understand correctly, that you say XDS will throw together for integration counts from many images even if they're spaced widely throughout the

[ccp4bb] a new version of XDS

2013-05-29 Thread Kay Diederichs
... is available for academic users at http://homes.mpimf-heidelberg.mpg.de/~kabsch/xds/ Please note that there are some incompatibilities; most notably, the new format of XPARM.XDS is different so that the new INTEGRATE does not work with an old XPARM.XDS. best, Kay smime.p7s

Re: [ccp4bb] a new version of XDS

2013-05-29 Thread Kay Diederichs
Sorry, Wolfgang Kabsch has decided against it. Kay Jacob Keller j-kell...@fsm.northwestern.edu schrieb: Any thoughts of making a Windows executable? Might help a lot of users JPK On Wed, May 29, 2013 at 4:20 PM, Kay Diederichs kay.diederi...@uni-konstanz.de wrote: ... is available

[ccp4bb] announcement: (another) GUI for XDS

2013-06-15 Thread Kay Diederichs
and I would like to learn about these. In particular, Mac experts please tell me how to solve the problems explained at the bottom of the Wiki article ... thanks, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: kay.diederi...@uni-konstanz.de Tel +49

Re: [ccp4bb] ctruncate bug?

2013-06-18 Thread Kay Diederichs
Dear Ed, AFAIK James Holton found the same issue, and a similar problem also existed in XDSCONV. In my view, it is an example of the problem that most programs so far have dealt with weak data in a suboptimal way, and have undergone little testing with such data. The latest version of XDSCONV

Re: [ccp4bb] ctruncate bug?

2013-06-18 Thread Kay Diederichs
Hi Frank, older versions of XDSCONV, for datasets with weak high-resolution data, printed a long list starting with: SUSPICIOUS REFLECTIONS NOT INCLUDED IN OUTPUT DATA SET (at most 100 are listed below) SUSPICIOUS REFLECTIONS NOT INCLUDED IN OUTPUT DATA SET (at

Re: [ccp4bb] ctruncate bug?

2013-06-18 Thread Kay Diederichs
Hi Jeff, what I did in XDSCONV is to mitigate the numerical difficulties associated with low h (called Score in XDSCONV output) values, and I removed the h -4 cutoff. The more negative h becomes, the closer to zero is the resulting amplitude, so not applying a h cutoff makes sense (to me,

Re: [ccp4bb] ctruncate bug?

2013-06-19 Thread Kay Diederichs
Hi James, Concerning XDSCONV, I cannot reproduce your plot. A Linux (64bit) program test_xdsconv which allows to input I, sigI, I, and mode, where I: measured intensity sigI: sigma(I) I: average I in resolution shell mode: -1/0/1 for truncated normal/acentric/centric prior is at

Re: [ccp4bb] ctruncate bug?

2013-06-19 Thread Kay Diederichs
On Wed, 19 Jun 2013 14:19:19 +0100, Kay Diederichs kay.diederi...@uni-konstanz.de wrote: I wonder if problem b) is why Evans and Murshudov observe little contribution of reflections in shells with CC1/2 below 0.27 in one of their test cases, which had very anisotropic data. sorry, forgot

Re: [ccp4bb] ctruncate bug?

2013-06-19 Thread Kay Diederichs
+0100, Kay Diederichs wrote: Hi Jeff, what I did in XDSCONV is to mitigate the numerical difficulties associated with low h (called Score in XDSCONV output) values, and I removed the h -4 cutoff. The more negative h becomes, the closer to zero is the resulting amplitude, so not applying a h

Re: [ccp4bb] ctruncate bug?

2013-06-20 Thread Kay Diederichs
Douglas, the intensity is negative if the integrated spot has a lower intensity than the estimate of the background under the spot. So yes, we are not _measuring_ negative intensities, rather we are estimating intensities, and that estimate may turn out to be negative. In a later step we try

Re: [ccp4bb] ctruncate bug?

2013-06-20 Thread Kay Diederichs
have reported a negative integrated intensity to begin with. I also understand that (Iobs-Icalc)^2 is not the actual refinement target, but the same point applies, and the actual target is based on a fundamental Gaussian assumption for the Is. On Jun 20, 2013, at 2:13 PM, Kay Diederichs

[ccp4bb] Gnuplot: how to plot with resolution values as labels on x-axis?

2013-06-24 Thread Kay Diederichs
please share the Gnuplot magic for doing so? thanks, Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: kay.diederi...@uni-konstanz.deTel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail is digitally

Re: [ccp4bb] Alternating positive and negative density

2013-06-25 Thread Kay Diederichs
Hi Peter, my estimate of the distance between the peaks would be based on bond distances and about twice that of Dale, but I agree with his general conclusion. Either a reflection (roughly in the h 0 0 direction) is stronger than it should be (ice?), or a very strong reflection was considered

Re: [ccp4bb] Alternating positive and negative density

2013-06-25 Thread Kay Diederichs
that should have been sort -gk5 XDS_ASCII.HKL | more (I should have tested before posting!) best, Kay On Tue, 25 Jun 2013 09:16:52 +0100, Kay Diederichs kay.diederi...@uni-konstanz.de wrote: ... b) inspect the outliers in XDS_ASCII.HKL with something like sort -nk5 XDS_ASCII.HKL | more

Re: [ccp4bb] announcement: (another) GUI for XDS

2013-06-26 Thread Kay Diederichs
Hi Sebastiano, sorry, I don't see immediately what's wrong. The console seems to show the XDS output of an INTEGRATE job that only looked at a single (judging from the small number of reflections ...) frame (number 10, I'd guess; you could check this if you scroll up a bit). Could you please

[ccp4bb] XDSGUI

2013-07-05 Thread Kay Diederichs
to me so that they can be fixed! best, Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: kay.diederi...@uni-konstanz.deTel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail is digitally signed. If your

Re: [ccp4bb] Where to cut the data in this medium resolution dataset

2013-07-23 Thread Kay Diederichs
Hi Stefan, you write The diffraction pattern looks great, the 3.4A reflections are visible by eye and the edge of the detector is about 2.8A. and for the 3.4A data Mean((I)/sd(I)) in the highest shell is 2.3 . I'm tempted to ask: what prevents you from using higher resolution data to, say,

Re: [ccp4bb] Processing files from XSCALE in Aimless

2013-07-26 Thread Kay Diederichs
Hi Sam, one possibility: there was a little bug in a recent build of XSCALE that resulted in one of the header lines of the output file to not specify the name XSCALE - it wrote: !GENERATED BY: July 4, 2012 and it should have been !GENERATED BY: XSCALE (VERSION March 30, 2013) The lack of

Re: [ccp4bb] Processing files from XSCALE in Aimless

2013-07-26 Thread Kay Diederichs
Hi Sam, Your version of XSCALE is OK since it prints out the string XSCALE (the date is OK - my fault!). Rp.i.m. is indeed not listed in XSCALE.LP. Best, Kay -- Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.

Re: [ccp4bb] delete reflections with negative peak profile correlation

2013-07-31 Thread Kay Diederichs
Hi, I completely agree with what Andrew writes. It's very easy: negative CORR means that the reflection profile after background subtraction has a negative correlation coefficient with the standard profile. How can this happen? Well, this situation occurs when the reflection is very weak and

Re: [ccp4bb] Advise on setting up/ maintaining a Ubuntu cluster

2013-07-31 Thread Kay Diederichs
I have a very different experience with NFS: we are using Gigabit Ethernet, and a 64bit RHEL6 clone with ECC memory as a file server; it has RAID1 ext4 home directories and RAID6 ext4 for synchrotron data. We have had zero performance or reliability problems with this in a computer lab with ~

Re: [ccp4bb] Advise on setting up/ maintaining a Ubuntu cluster

2013-07-31 Thread Kay Diederichs
@JISCMAIL.AC.UK (on behalf of Kay Diederichs kay.diederi...@uni-konstanz.de) Subject: Re: [ccp4bb] Advise on setting up/ maintaining a Ubuntu cluster To: CCP4BB@JISCMAIL.AC.UK I have a very different experience with NFS: we are using Gigabit Ethernet, and a 64bit RHEL6 clone with ECC memory as a file

[ccp4bb] Vacancy: Professor for Biophysics at University of Konstanz

2013-08-14 Thread Kay Diederichs
-konstanz.de/stellen or by contacting Mr. Hanns Fahlbusch by e-mail: hanns.fahlbu...@uni-konstanz.de . = An application cover form (PDF) can be downloaded from http://www.uni-konstanz.de/stellenangebote/?cont=stellauswseite=2013/136id=3 . -- Kay Diederichshttp

Re: [ccp4bb] x-ray diffraction data analysis (XDS)

2013-09-01 Thread Kay Diederichs
The HKL2000 stats look very untypical to me. I wonder what the completeness is. For the XDS processing, have you tried the hints given in the Optimization article in XDSwiki, in particular recycling of GXPARM.XDS and using the *_E.S.D. parameters as found in INTEGRATE.LP ? According to your

Re: [ccp4bb] x-ray diffraction data analysis (XDS)

2013-09-01 Thread Kay Diederichs
I forgot: you should be using FRIEDEL'S_LAW=TRUE

Re: [ccp4bb] Rfree stuck

2013-10-13 Thread Kay Diederichs
Are you certain that the data are not twinned? HTH Kay

Re: [ccp4bb] Rfree stuck

2013-10-13 Thread Kay Diederichs
at 1.7 � it is 239%. Do I have enough data to justify 1.7 � resolution? Are those Rfactor values are justified with this resolution?Thanking you DCB On Sun, Oct 13, 2013 at 12:03 PM, Kay Diederichs kay.diederi...@uni-konstanz.de wrote: Are you certain that the data are not twinned? HTH

Re: [ccp4bb] High Rsyms between 5-7 A

2013-10-15 Thread Kay Diederichs
Hi Ursula, if you look at the Wilson plot, you see a minimum near 6A resolution. This means that in the range 7-5A, intensities are low, and Rsyms are therefore elevated. best, Kay On Mon, 14 Oct 2013 11:52:03 -0700, Ursula Schulze-Gahmen uschulze-gah...@lbl.gov wrote: Here is some more

Re: [ccp4bb] R-factor for radiation damage (R_d)

2013-10-18 Thread Kay Diederichs
Dear Daniel, A very good question. I have seen R_d plots jumping up and down, most often in low-symmetry space groups. I think the mountains are due to residual systematic differences between symmetry-related observations, differences that the scaling could not compensate for whatever reason.

Re: [ccp4bb] Triclinic solution for a dataset with pseudo-translational symmetry, possible pseudo-centering and possible pseudo-merohedral twinning. How to proceed?

2013-10-22 Thread Kay Diederichs
On Mon, 21 Oct 2013 23:28:48 -0500, Stefan Gajewski sgajew...@gmail.com wrote: ... 5) tetartohedral twinning? what refinement software is able to deal with that? Refmac HTH, Kay

Re: [ccp4bb] Fix cell dimensions

2013-11-19 Thread Kay Diederichs
Dear Niu, concerning XDS: there is no way, using just XDS.INP, to force the IDXREF step to use a cell that is not compatible with the reflections that COLSPOT found. But I can think of two ways to reach your goal (even if I believe that crystallographically it makes no sense to ignore every

Re: [ccp4bb] 100% Rmerge in high resolution shell

2013-11-19 Thread Kay Diederichs
-handicapped times. It is entirely possible that all this is exactly what you said, just with different wording. But I guess more wording is still needed given that people keep asking about Rmerge. Cheers, Ed. On Tue, 2013-11-19 at 14:22 +, Kay Diederichs wrote: Hi Jim, of course the issue

Re: [ccp4bb] Stereo monitor

2013-11-22 Thread Kay Diederichs
I'm using a 24 BenQ XL2420TX (emitter builit-in; price 500€) monitor connected to the DisplayPort of a Quadro FX 380 card. Works very well on 64bit ScientificLinux 6.4 with the kmod-nvidia driver from ElRepo. Please also see http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php/Stereo .

Re: [ccp4bb] Wrong Space Group?

2013-12-14 Thread Kay Diederichs
On Fri, 13 Dec 2013 19:44:44 +, D Bonsor dbon...@ihv.umaryland.edu wrote: Dear D, I agree with Tim and Jürgen that a) the map after Phaser, and before refinement is the most unbiased and should be used for sequence assignment. b) there may be a sequence register shift error that is

Re: [ccp4bb] twinning fun

2014-01-29 Thread Kay Diederichs
Dear Bert, as Dirk has pointed out, if P622 is the correct space group, then the twinning statistics printed out if you process in P6 are meaningless. Intensity statistics, like the ratio of I^2/I^2 , can be misleading if there is (e.g. pseudo-translational) NCS in the crystal; however, the

Re: [ccp4bb] Examples of multiple ASU copies with different conformations

2014-01-29 Thread Kay Diederichs
Hi Shane, some crystal forms of trimeric AcrB (a multi-drug resistance secondary transporter) have 3 (or 6) monomers in the ASU and these are substantially different, which suggests how the protein functions. One reference is e.g. Seeger et al. (2006) Structural Asymmetry of AcrB Trimer

Re: [ccp4bb] high Rwork / Rfree after MR

2014-02-05 Thread Kay Diederichs
Dear Shanti Pal Gangwar, based on the information you give, this does not sound like solved structure to me. By the way, the ACA conference at the end of May will feature a session data processing with the pros, where difficult projects will be analyzed, and hopefully structures like this

Re: [ccp4bb] Sister CCPs

2014-02-13 Thread Kay Diederichs
Nat, that's why I set up the CCP4 wiki at http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php/Main_Page ! The idea is that everybody benefits: experienced crystallographers/biologists can concentrate on the new and difficult questions coming up on the bulletin board, and novices find

Re: [ccp4bb] Sister CCPs

2014-02-14 Thread Kay Diederichs
) and it vanishes forever. Are people suggesting we abandon an empirically proven mechanism merely to save me the need for this tiny hand-movement? phx On 14/02/2014 07:19, Kay Diederichs wrote: Nat, that's why I set up the CCP4 wiki at http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php

Re: [ccp4bb] What really happens in XDSCONV?

2014-02-15 Thread Kay Diederichs
On Fri, 14 Feb 2014 17:25:36 +, Derek Logan derek.lo...@biochemistry.lu.se wrote: Hi Tim, I would actually recommend using pointless (or xprep) instead of xdsconv. It is much easier to use and maybe even less error prone. I take the point about pointless but XPREP is commercial software

Re: [ccp4bb] What really happens in XDSCONV?

2014-02-15 Thread Kay Diederichs
On Sat, 15 Feb 2014 09:50:43 +, Kay Diederichs kay.diederi...@uni-konstanz.de wrote: pointless is a good program, and I also use it, to clarify: I use pointless for space group determination. I don't use it for producing multi-record MTZ files, since I use XDSCONV.

Re: [ccp4bb] High Rwork/Rfree vs. Resolution

2014-02-22 Thread Kay Diederichs
I agree with the general points that Mark makes. For the basic problem to find out whether the model quality (and R-values) is limited by the data quality, you can compare CCwork with CC* - if CCwork is significantly lower than CC*, then this means that either your model could in principle be

Re: [ccp4bb] High Rwork/Rfree vs. Resolution

2014-02-22 Thread Kay Diederichs
Projects and problems like this are clearly a justification for asking to deposit not only the results from data processing, but also the raw data frames. These would allow developers to improve the models underlying their algorithms, and to find those corner cases where the algorithms break.

Re: [ccp4bb] High Rwork/Rfree vs. Resolution

2014-02-23 Thread Kay Diederichs
oops, thanks for correcting me! Kay On Sun, 23 Feb 2014 11:28:31 +, Harry Powell ha...@mrc-lmb.cam.ac.uk wrote: Hi Kay means, of course, the ACA meeting in Albuquerque, not the IUCr in Montreal!

[ccp4bb] account creation for CCP4wiki (and XDSwiki)

2014-03-12 Thread Kay Diederichs
Dear all, today we re-opened account creation for CCP4wiki (and XDSwiki). It had been closed since we were hit by spammers (like e.g. PyMolwiki), but we recently discovered a method that helps to prove that the account is really created by a a human being - as opposed to a computer program

Re: [ccp4bb] Trouble with conversion from HKL to CCP4 file format

2014-03-27 Thread Kay Diederichs
Hi, I added some explanation for the XSCALE output to the XDSwiki at http://strucbio.biologie.uni-konstanz.de/xdswiki/index.php/Xdsconv#explanation_of_typical_output . hope this helps, Kay

Re: [ccp4bb] error xds

2014-04-02 Thread Kay Diederichs
It means that there exists a technical problem that probably has nothing directly to do with your data and XDS: the program tried to read data that could not be read. I would guess that the disk is full, or your quota exceeded. Hope this helps, Kay

Re: [ccp4bb] error xds

2014-04-02 Thread Kay Diederichs
On Tue, 1 Apr 2014 17:28:48 +0200, Almudena Ponce Salvatierra maps.fa...@gmail.com wrote: sorry, I missed this part of the error message: !!! ERROR !!! AUTOMATIC DETERMINATION OF SPOT SIZE PARAMETERS HAS FAILED. YOU MAY RESTART THIS STEP AFTER SPECIFYING VALUES IN XDS.INP FOR:

Re: [ccp4bb] jiffy for analyzing spot.xds?

2014-04-15 Thread Kay Diederichs
yes, and http://strucbio.biologie.uni-konstanz.de/xdswiki/index.php/Generate_adx does this for all frames contributing to SPOT.XDS. HTH, Kay On Tue, 15 Apr 2014 11:38:23 +0100, T. Nakane tn...@cam.ac.uk wrote: Dear Francis, You can visualize SPOT.XDS with adxv. Since column 3 of SPOT.XDS is

Re: [ccp4bb] Rmerge, Rmeas, I/sigma, Mn(I/sd)

2014-04-18 Thread Kay Diederichs
Hi Roberto, for my taste the answers so far have not mentioned (or I did not understand them) that there is a distinction between indicators of the precision of merged data, and those for the precision of unmerged data. It is not possible to directly compare (or equate) indicators of one

Re: [ccp4bb] Rmerge, Rmeas, I/sigma, Mn(I/sd)

2014-04-18 Thread Kay Diederichs
On Fri, 18 Apr 2014 12:33:30 +0200, Bernhard Rupp hofkristall...@gmail.com wrote: [There is] a distinction between indicators of the precision of merged data, and those for the precision of unmerged data. Let's take a step back - definitions matter: (i) We have multiple observations of the

Re: [ccp4bb] Rmerge, Rmeas, I/sigma, Mn(I/sd)

2014-04-18 Thread Kay Diederichs
Hi Ed, your example seems to be designed to show that the average of reciprocal values is not the same as the reciprocal of an average value? If that is what you are alluding to, then please not that the (relatively narrow) Wilson distribution of intensities has the effect of making the

Re: [ccp4bb] Space group problem

2014-05-08 Thread Kay Diederichs
Hi, please post the pointless table Analysing rotational symmetry in lattice group P 6/m m m. This gives a quite clear information about the presence/absence of rotational symmetry axes. Look at at the following example Analysing rotational symmetry in lattice group P 6/m m m

Re: [ccp4bb] AW: [ccp4bb] Space group problem

2014-05-08 Thread Kay Diederichs
On Thu, 8 May 2014 16:56:01 +0200, Christophe Wirth christophe.wi...@biochemie.uni-freiburg.de wrote: Dear all, To add another bit to the discussion, I would say that an increase of Rmerge and Rmeas is just expected in such a case, isn't it? According to your tables, in P1, the multiplicity

[ccp4bb] Postdoctoral Fellow: Data Processing and Merging in Serial Crystallography

2014-05-14 Thread Kay Diederichs
including the development of advanced beamline instrumentation and crystallographic methods, as well as structural biology projects in collaboration with the Biomolecular Research Group at PSI and external partners. In collaboration with Prof. Kay Diederichs at University of Konstanz, we

Re: [ccp4bb] data processing with XDS

2014-05-20 Thread Kay Diederichs
Dear Almudena, if you follow the recommendations given in the Difficult datasets article on XDSwiki, your problem would have a good chance to be solved. best wishes, Kay On Mon, 19 May 2014 18:18:46 +0200, Almudena Ponce Salvatierra maps.fa...@gmail.com wrote: Dear all, I am looking for

Re: [ccp4bb] Xia2 / XDS issues

2014-05-20 Thread Kay Diederichs
Dear Tony, I renamed your LP_01.tmp to INTEGRATE.LP and ran XDSGUI - this shows nicely that after frame 150 things fall over. So pls try the recommendations in the Difficult datasets article of XDSwiki. Normally you should not need to run two processing jobs; just prevent refinement from

Re: [ccp4bb] Reprocess data with new resolution cutoff?

2014-05-20 Thread Kay Diederichs
Hi Thomas, strictly speaking, there is no need to re-process the data (because it wouldn't change the data anyway). It may even be that the data beyond 2.55A contain some signal (CC1/2 should tell you about that), which future refinement programs can use - so you could deposit at the RCSB all

Re: [ccp4bb] Reprocess data with new resolution cutoff?

2014-05-21 Thread Kay Diederichs
Hi Thomas, I too would use the data out to 2.55A, as you did. The main point is that the 2.45A model produces a worse Rfree (30.16%) at 2.55A than the 2.55A model does (30.03%). And this tendency is confirmed for the 2.35A model, so there's no point in going beyond 2.55A. best, Kay

Re: [ccp4bb] experimental phasing at low resolution

2014-06-03 Thread Kay Diederichs
Hi Vijay, I think your data may be good enough to solve the substructure and get phases, but 1) you should be using the latest versions of SHELXC SHELXD SHELXE - it seems you are using SHELXD-2006/3 . 2) you could try more cycles (100 is on the low side) 3) you might want to try searching for

Re: [ccp4bb] merging of reflection with identical indices

2014-06-11 Thread Kay Diederichs
Hi Wolfram, just want to point out that the mathematics of what you want to do is conceptually really simple - see http://en.wikipedia.org/wiki/Weighted_arithmetic_mean#Dealing_with_variance . Programs like aimless or others (e.g. xdsconv could also be used) just implement the two formulas

Re: [ccp4bb] Disorder or poor phases?

2012-04-10 Thread Kay Diederichs
Hi Dale, my experience is that high-B regions may become visible in maps only late in refinement. So my answer to the original poster would be - both global reciprocal-space (phase quality) and local real-space (high mobility) features contribute to a region not appearing ordered in the map.

[ccp4bb] new XDS version

2012-04-20 Thread Kay Diederichs
) know; in such a case pls consider sharing the data (confidentially) with us that allow to reproduce the problem. If you wish to be notified of future new versions, please send me an email and I'll add you to my list. thanks, Kay -- Kay Diederichshttp://strucbio.biologie.uni

Re: [ccp4bb] how to ignore spot overlap in imosflm?

2012-05-17 Thread Kay Diederichs
Hi, there are two points in Herman's post that I'd like to comment upon: 1) in case of XDS, there are two modes of reporting the completeness: one is triggered with FRIEDEL'S_LAW=TRUE, and the other with FRIEDEL'S_LAW=FALSE. Obviously the reported completeness will differ between these two

Re: [ccp4bb] High Resolution Cutoff

2012-06-11 Thread Kay Diederichs
Dear Michael, the purpose of our paper (http://www.sciencemag.org/content/336/6084/1030) was to develop and document methods that enable to check for yourself what the best high resolution cutoff is - no rules of thumb are necessary! However, repeated use of the paired refinement technique (3

Re: [ccp4bb] Requesting old data sets

2012-07-04 Thread Kay Diederichs
Hi Jürgen, I'd be willing to share my datasets obtained since 1999, which I have online. Older ones are on tape and it would be a significant effort to retrieve them, if at all possible. best, Kay

Re: [ccp4bb] aimless, anisotropy, and resolution cutoff?

2012-07-19 Thread Kay Diederichs
Hi Vincent, my advice is: if in doubt, scale at the highest of those resolution choices. This way you don't have to go back to scaling later. There is no harm in using the highest resolution. Don't let yourself be fooled by Rmerge. best, Kay On Thu, 19 Jul 2012 17:52:14 +0200, vincent Chaptal

Re: [ccp4bb] resolution limit

2012-07-19 Thread Kay Diederichs
Hi Narayan, there's nothing wrong with using data with I/sigmaI 2.5, Rsym 224.3 % for multiplicity 7.8 and completeness 98.2 %. However, when you discarded frames you might have made the data worse - one should only reject data if they deviate systematically (e.g. from radiation damage).

Re: [ccp4bb] RE : [ccp4bb] Large unit cell, overlaps

2012-07-19 Thread Kay Diederichs
On Tue, 17 Jul 2012 06:26:39 +, LEGRAND Pierre pierre.legr...@synchrotron-soleil.fr wrote: Hi Jason, To answer your initial question about overlaps versus finer slicing, you can get a good description of the problem in Fig10 of Z. Dauter article Data-collection strategies (open

Re: [ccp4bb] Large unit cell, overlaps

2012-07-19 Thread Kay Diederichs
Hi Jason, I looked at the part of FRAME.cbf you posted, and I'd say it looks ok (i.e. nothing to worry about). Some overlap of a reflection doesn't matter much; if its full profile is not available then INTEGRATE replaces the missing intensity by an estimate based on the known fraction of

[ccp4bb] not strictly crystallography-related

2012-08-06 Thread Kay Diederichs
myself, at least not with reasonable effort ... thanks a lot, Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: kay.diederi...@uni-konstanz.deTel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail

Re: [ccp4bb] CC1/2, XDS and resolution cut off

2012-08-06 Thread Kay Diederichs
Dear Marcus, I have a few comments: - we do not suggest any fixed value (like 0.125) for a CC1/2 cutoff. One reason why a fixed value should not be carved in stone is that future data processing and refinement programs might extract more information from the weak data than current ones do.

Re: [ccp4bb] not strictly crystallography-related (summary)

2012-08-07 Thread Kay Diederichs
Dear all, thanks for the many answers sent privately or posted to CCP4BB! I cannot answer them all individually, and I also cannot answer the questions that some people asked, since I have not yet heard back from my colleague whose experiment that is. But I'm sure there are some options for

Re: [ccp4bb] Which Coot for Scientific Linux 6.3

2012-09-21 Thread Kay Diederichs
Hi Fred, on today's PC hardware, a 64bit Linux should be used. We have been using coot-0.7-pre-1-revision-3965-binary-Linux-x86_64-centos-5-python-gtk2 on our 64bit SL 6.3 systems without problems. I just now installed coot-0.7-pre-1-revision-4360-binary-Linux-x86_64-centos-6-python-gtk2 on

Re: [ccp4bb] Indexing with XDS

2012-10-09 Thread Kay Diederichs
Dear Theresa, concerning your first sentence which is a bit short to my taste: if you index, you expect to find the cell parameters. These enable you to process the dataset. At the end of processing, a decision has to be made about the spacegroup. Only then structure solution can be tried,

Re: [ccp4bb] Twinned Data - more information

2012-10-20 Thread Kay Diederichs
Dear Iris, just to add to Fred's posting: since XDS Version June 2, 2008 re-indexing is no longer necessary if REFERENCE_DATA_SET is used - XDS then does the re-indexing automatically in the CORRECT step. This makes it very easy to avoid the problem of alternative indexing in space groups like

Re: [ccp4bb] XDS problem

2012-11-11 Thread Kay Diederichs
Dear Xinghua, it seems that you have hit a bug: assert violation indicates that an internal error has occurred, i.e. some situation was hit that the program is not prepared to handle. There must be something very special about your dataset - maybe a very small number of reflections, maybe only

Re: [ccp4bb] cc1/2

2012-11-29 Thread Kay Diederichs
Dear Jay, I met Wladek Minor last week and I understood that there would be a version of SCALEPACK this week which outputs CC1/2. So ask the HKL crew, I'd suggest. Furthermore, the latest nightly builds of Phenix (since dev-1208) have mmtbx.cc_star which calculates CC1/2 and other quantities

Re: [ccp4bb] Izit dye stained crystal

2012-12-01 Thread Kay Diederichs
On Fri, 30 Nov 2012 17:27:41 -0500, Sarathy Karunan Partha sarathyus...@gmail.com wrote: Dear all, Here is the XSCALE.LP output after scaling for the izit dye stained crystak. Sorry for attaching the .INP file. Sarathy On Fri, Nov 30, 2012 at 4:19 PM, Sarathy Karunan Partha

Re: [ccp4bb] changing resolution bins statistics in CORRECT.LP

2013-01-16 Thread Kay Diederichs
Dear Sebastiano, sorry, it is not possible. Indeed, only XCSALE allows you to define the resolution ranges yourself. HTH, Kay On Tue, 15 Jan 2013 16:22:14 +0100, Sebastiano Pasqualato sebastiano.pasqual...@gmail.com wrote: Hi all, I was wondering if XDS allows to change the number of

Re: [ccp4bb] changing resolution bins statistics in CORRECT.LP

2013-01-16 Thread Kay Diederichs
Sebastiano, CORRECT does scale the data. XSCALE is only needed for two or more datasets, or if other requirements exist - you named one. The two varieties of FRIEDEL'S_LAW differ in their rejections! HTH, Kay Sebastiano Pasqualato sebastiano.pasqual...@gmail.com schrieb: Thanks to Kay

Re: [ccp4bb] R-factors of various kind

2013-01-20 Thread Kay Diederichs
http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php/R-factors would be a start ... HTH, Kay On Fri, 18 Jan 2013 09:37:12 +0530, Teri Arman teriar...@gmail.com wrote: Hi, it would be nice if you highlight different type of R-factors used in the literature. I like to understand various

Re: [ccp4bb] CCP4 Update 014

2013-01-20 Thread Kay Diederichs
Hi Andrey, Eugene and others - it is time to say that this new system is extremely useful, and so easy to use at the same time! Gone are the times when one had to worry about manually updating parts of CCP4. I just wonder why there should ever be a need for a CCP4 6.4.0 release; a rolling

Re: [ccp4bb] statistical or systematic? bias or noise?

2013-03-12 Thread Kay Diederichs
On Mon, 11 Mar 2013 11:46:03 -0400, Ed Pozharski epozh...@umaryland.edu wrote: ... Notice that I only prepared one sample, so if on that particular instance I picked up 4.8ul and not 5.0ul, this will translate into systematically underestimating protein concentration, even though it could have

Re: [ccp4bb] Resolution limit of index in XDS

2013-03-21 Thread Kay Diederichs
Dear Herman, some pros and cons are documented at http://strucbio.biologie.uni-konstanz.de/xdswiki/index.php/Wishlist#Would_be_nice_to_have , and the workaround is at http://strucbio.biologie.uni-konstanz.de/xdswiki/index.php/Ice_rings . These XDSwiki articles are old, and nobody has

Re: [ccp4bb] Resolution limit of index in XDS

2013-03-21 Thread Kay Diederichs
On Thu, 21 Mar 2013 08:28:27 +, herman.schreu...@sanofi.com wrote: Dear Tim, It could be that COLSPOT does not rely on experimental setup parameters. However, XDS must have reasonably close starting values for distance, direct beam position etc., otherwise the autoindexing would fail, so

Re: [ccp4bb] how many stuck datasets are actually twinned?

2007-02-21 Thread Kay Diederichs
is painful, and a lot of additional work! But man twinning is always enlightening reading. Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED]Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz

Re: [ccp4bb] I/sigma in XDS output

2007-04-19 Thread Kay Diederichs
are suitable for deciding about the resol cutoff. HTH, Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED]Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz smime.p7s Description: S/MIME

Re: [ccp4bb] Pymol - windows

2007-07-05 Thread Kay Diederichs
. Biochemistry and Molecular Biology Dept. 201 Althouse Lab., University Park Pennsylvania State University, PA16802 Tel. (814)863-8703 Fax. (814)865-7927 -- -- Kay Diederichs

Re: [ccp4bb] how to convert matrix to angle

2007-07-07 Thread Kay Diederichs
the rotation matrix a11 a12 a13 a21 a22 a23 a31 a32 a33 then (a11 + a22 + a33 - 1) / 2 is the cosine of the angle you're looking for. HTH, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED] Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie

Re: [ccp4bb] Fedora core 5 install problem

2007-07-14 Thread Kay Diederichs
. The gui pops up normally. But when I try to run a process the gui shows the process as starting and it hangs there never switching to running. And there is no log file available in the gui as well. Any ideas? Thanks, John Bruning -- Kay Diederichs http

[ccp4bb] Suggestion: Wiki -- was:Re: [ccp4bb] need help--Rfree is not decreasing

2007-07-21 Thread Kay Diederichs
occupancy or high B factor or mutating to Ala help decrease Rfree substantially? If not, is there any better strategies to lower down R factors? I will be very appreciative if you have any suggestions or comments to offer. Thank you in advance. Best, Joe -- Kay Diederichs

Re: [ccp4bb] initial model built in Fo map not refining

2007-07-27 Thread Kay Diederichs
group of the processed data, and it is definitely P21212. Does anyone have any suggestions of what I may be doing wrong? Thanks in advance for your help. Kind regards, Satinder -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED] Tel +49 7531

Re: [ccp4bb] CCP4 Wiki

2007-07-27 Thread Kay Diederichs
this idea, and reduces the potential benefit. Kay For hierarchies, parallel efforts, GPL, I agree. ;-) Tassos PS Kay, your digital signature has some trouble for me - cant read it - you may want to know. On Jul 27, 2007, at 11:14, Kay Diederichs wrote: Kevin Cowtan schrieb: Yes

Re: [ccp4bb] initial model built in Fo map not refining

2007-07-27 Thread Kay Diederichs
Anastassis Perrakis schrieb: I also have to say that (for once!) I dont agree with Kay. I have tried in the past to refine against datasets processed with different programs, and I know people that do that a lot; the differences are minor at best (1-2 % Rfree, mostly differences are in the

Re: [ccp4bb] CCP4 Wiki

2007-07-27 Thread Kay Diederichs
Kevin Cowtan schrieb: Yes, that is our intention. CCP4 would probably be at the third level of a hierarchy including: Macromolecular crystallographic techniques Structure solution, analysis and visualisation software The CCP4 suite Kevin, why does/will/should the CCP4 Wiki have a

Re: [ccp4bb] difference density ripples around Hg atoms

2007-08-01 Thread Kay Diederichs
of the ripples. best, Kay -- Kay Diederichshttp://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED]Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz smime.p7s Description: S/MIME Cryptographic Signature

Re: [ccp4bb] real-space vs. reciprocal space refinement

2007-08-11 Thread Kay Diederichs
.) to develop new methods to make their point. Hopefully this is only a starting point. best, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED] Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universitaet Konstanz, Box M647, D-78457

Re: [ccp4bb] coot in stereo

2007-08-14 Thread Kay Diederichs
and usermode software. Intel CPUs are quite different from AMD ones in that respect. HTH, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: [EMAIL PROTECTED] Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz

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