Re: [ccp4bb] Electron density improvement with resolution graphic
You may also have a look at James Holton's page http://ucxray.berkeley.edu/~jamesh/movies/ and take a screenshot of one of his movies. Tim -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A On Fri, 4 Dec 2009, Brad Bennett wrote: Hi all- I recall seeing a long time ago a figure which showed the progressive improvement of electron density as one increases resolution, say from 6 to 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing the ability to model side chains of alpha helices at higher resolutions and the other a simpler graphic of a tyrosine aromatic ring showing the electron density hole in the middle of the ring once near atomic resolution maps are obtained. Does anyone have, in their teaching notes or a textbook or presentation, a graphic which displays this? I need it for a talk this weekend and Google searches have come up blank. If all else fails, I can generate it myself...(lazy sigh) Thanks in advance- Brad
[ccp4bb] Electron density improvement with resolution graphic
Hi all- I recall seeing a long time ago a figure which showed the progressive improvement of electron density as one increases resolution, say from 6 to 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing the ability to model side chains of alpha helices at higher resolutions and the other a simpler graphic of a tyrosine aromatic ring showing the electron density hole in the middle of the ring once near atomic resolution maps are obtained. Does anyone have, in their teaching notes or a textbook or presentation, a graphic which displays this? I need it for a talk this weekend and Google searches have come up blank. If all else fails, I can generate it myself...(lazy sigh) Thanks in advance- Brad
Re: [ccp4bb] Electron density improvement with resolution graphic
You can find one here on the Cambridge X-ray crystallography course website: http://www-structmed.cimr.cam.ac.uk/Course/Fitting/fittingtalk.html On Fri, Dec 4, 2009 at 8:25 PM, Brad Bennett bradbennet...@gmail.comwrote: Hi all- I recall seeing a long time ago a figure which showed the progressive improvement of electron density as one increases resolution, say from 6 to 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing the ability to model side chains of alpha helices at higher resolutions and the other a simpler graphic of a tyrosine aromatic ring showing the electron density hole in the middle of the ring once near atomic resolution maps are obtained. Does anyone have, in their teaching notes or a textbook or presentation, a graphic which displays this? I need it for a talk this weekend and Google searches have come up blank. If all else fails, I can generate it myself...(lazy sigh) Thanks in advance- Brad -- Jim Fairman, Ph D. Post-Doctoral Fellow National Institutes of Health - NIDDK Cell: 1-865-748-8672 Lab: 1-301-594-9230 E-mail: fairman@gmail.com james.fair...@nih.gov
Re: [ccp4bb] Electron density improvement with resolution graphic
James Holton has a great little movie showing how electron density changes with decreasing resolution: http://ucxray.berkeley.edu/~jamesh/movies/resolution.mpeg Jon On Dec 4, 2009, at 5:37 PM, Jim Fairman wrote: You can find one here on the Cambridge X-ray crystallography course website: http://www-structmed.cimr.cam.ac.uk/Course/Fitting/fittingtalk.html On Fri, Dec 4, 2009 at 8:25 PM, Brad Bennett bradbennet...@gmail.com wrote: Hi all- I recall seeing a long time ago a figure which showed the progressive improvement of electron density as one increases resolution, say from 6 to 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing the ability to model side chains of alpha helices at higher resolutions and the other a simpler graphic of a tyrosine aromatic ring showing the electron density hole in the middle of the ring once near atomic resolution maps are obtained. Does anyone have, in their teaching notes or a textbook or presentation, a graphic which displays this? I need it for a talk this weekend and Google searches have come up blank. If all else fails, I can generate it myself...(lazy sigh) Thanks in advance- Brad -- Jim Fairman, Ph D. Post-Doctoral Fellow National Institutes of Health - NIDDK Cell: 1-865-748-8672 Lab: 1-301-594-9230 E-mail: fairman@gmail.com james.fair...@nih.gov
Re: [ccp4bb] Electron density improvement with resolution graphic
This could be useful: http://www.ruppweb.org/Xray/resolution.html BR From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of Brad Bennett Sent: Friday, December 04, 2009 5:26 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Electron density improvement with resolution graphic Hi all- I recall seeing a long time ago a figure which showed the progressive improvement of electron density as one increases resolution, say from 6 to 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing the ability to model side chains of alpha helices at higher resolutions and the other a simpler graphic of a tyrosine aromatic ring showing the electron density hole in the middle of the ring once near atomic resolution maps are obtained. Does anyone have, in their teaching notes or a textbook or presentation, a graphic which displays this? I need it for a talk this weekend and Google searches have come up blank. If all else fails, I can generate it myself...(lazy sigh) Thanks in advance- Brad
