[ccp4bb] Postdoctoral and Senior Technician Position at CNIO, Madrid

2009-07-23 Thread Daniel Lietha
*Two positions at a post-doctoral and a senior technician level are available from September 15th at the Structural Biology and Biocomputing Programme of the Spanish National Cancer Research Centre (CNIO) in Madrid, Spain.* The research focuses on signalling and structural aspects of cell adhesion

Re: [ccp4bb] Twinning Reference(s) Addressing Common Twinning Problems

2009-07-23 Thread Nathaniel Echols
On Thu, Jul 23, 2009 at 9:42 AM, Jacob Keller wrote: > Dear Crystallographers, > > I have not done the statistics, but I have noticed that a large portion of > the inquiries directed to the BB are twinning-related. While I recognize > that many of these issues have case-specific details, it may b

Re: [ccp4bb] is my crystal twinned or not?

2009-07-23 Thread George M. Sheldrick
Dear Ulrich, You are quite correct, I must be getting old and senile! Best wishes, George Prof. George M. Sheldrick FRS Dept. Structural Chemistry, University of Goettingen, Tammannstr. 4, D37077 Goettingen, Germany Tel. +49-551-39-3021 or -3068 Fax. +49-551-39-22582 On Thu, 23 Jul 2009, Bauma

[ccp4bb] postdoc position at London, Ontario, Canada

2009-07-23 Thread Hong Ling
Dear all, - A postdoctoral position in structural biology is available at Dr. Hong Ling's Laboratory in the Department of Biochemistry, The University of Western Ontario, London, ON, Canada. The research is focused on translesion DNA replication and regulation of epigenetic factors. The

[ccp4bb] Twinning Reference(s) Addressing Common Twinning Problems

2009-07-23 Thread Jacob Keller
Dear Crystallographers, I have not done the statistics, but I have noticed that a large portion of the inquiries directed to the BB are twinning-related. While I recognize that many of these issues have case-specific details, it may be that there are references which might address these inquir

Re: [ccp4bb] *adobe-courier-medium-r*--8* font again: hklview

2009-07-23 Thread Ethan Merritt
On Thursday 23 July 2009 04:57:58 Boaz Shaanan wrote: > Hi all, > > This has been brought up before but I'm not sure whether any solution has > been suggested and if so, what it was. > > hklview complains: > > ** xdl_view error in routine xdl_open_view ** > ** Unable to load *adobe-courier-me

Re: [ccp4bb] is my crystal twinned or not?

2009-07-23 Thread George M. Sheldrick
It appears that P212121 twinned so that the apparent space group is P43212 or P41212 is more common than I had realized. This requires that two axes are approximately equal in length and that the reflections 00l with l=4n+1 and l=4n+3 are 'accidentally' missing. It is possible that in such cases t

[ccp4bb] AW: [ccp4bb] is my crystal twinned or not?

2009-07-23 Thread Stefan Gerhardt
Dear Matt, as Eleanor pointed out your obtained solution is certainly correct, and for 2.8ang resolution almost as good as it could get. But could it not just be that the residual density you observed in your electron density ("There is some density for the receptor ") isn't the receptor but ano

Re: [ccp4bb] is my crystal twinned or not?

2009-07-23 Thread Eleanor Dodson
It seems very likely your crystal is twinned - the moments and cumulative intensity are a good indicator of twinning, especially when there isnt much NCS. But your solution is almost certainly partially correct - the Rfactor is pretty low. It is a good idea to run pointless which gives you t

[ccp4bb] *adobe-courier-medium-r*--8* font again: hklview

2009-07-23 Thread Boaz Shaanan
Hi all, This has been brought up before but I'm not sure whether any solution has been suggested and if so, what it was. hklview complains: ** xdl_view error in routine xdl_open_view ** ** Unable to load *adobe-courier-medium-r*--8* font ** Checking xds_view.c in ccp4-6.1.1/x-windows/xdl_vie

Re: [ccp4bb] is my crystal twinned or not?

2009-07-23 Thread Karsten Niefind
Am 23 Jul 2009 um 0:31 hat George M. Sheldrick geschrieben: > Dear Matthew, > > If it is P43 and merohedrally twinned, you should not see systematic > absences for the 21 axis. In fact there is no way of getting the > P43212 systematic absences from a twinned crystal of lower > symmetry. > I pres

Re: [ccp4bb] SAD questions

2009-07-23 Thread DebajyotiDutta
Dear Sir, Thank you for your reply. The values I am getting for the occupancies are 1.4, 1.6 and 2.1 etc. I kept the both hand same (MR sol and SAD data). I am highly benefited with these discussions. Sincerely debajyoti On Thu, 23 Jul 2009 00:49:57 +0530 wrote >Hi, > >If you'r

Re: [ccp4bb] Self Rotation map in R32?

2009-07-23 Thread d888223
Dear all: Our dataset is belong to R32. But in the Top10 peak of self rotation (shown below), the peaks of 2-fold (kappa = 180 ) are more often than the 3-fold (kappa = 120). We also got dimmer in asymetric unit. Does it make sense to the self rotation? Any comments would be appreciated. JS #