Re: [ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread Joe Cockburn
Dear Mona, Yes. You can get Denzo to reject reflections on or close to ice rings, or any other features with highly irregular background variations, by increasing the value of the REJECT keyword (see p. 40 of the HKL2000 manual by D. Gerwith, http://www.hkl-xray.com/hkl_web1/hkl/manual_online.pdf).

Re: [ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread harry powell
Hi You can exclude the ice rings easily in Mosflm - from the command line - (a) Autoindexing - AUTOINDEX EXCLUDE ICE (but see user guide for more on this) (b) Processing - RESOLUTION EXCLUDE ICE Or if you try iMosflm, just check the button that says "exclude ice rings" (Ind

Re: [ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread Dunten, Pete W.
UK Subject: [ccp4bb] Question re: ice rings in diffraction data Hello all, I have a query re: processing data. I have some lovely diffraction data that has been marred by ice rings (so...not as lovely as it could be). I was told it may be possible to mask the regions of the ice rings (obviously s

Re: [ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread Alexander . Schiffer
wert ** From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of Mona Rahman Sent: Tuesday, July 15, 2008 4:14 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Question re: ice rings in diffraction data Hello all, I have a quer

Re: [ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread J Knight
One can try to set the high resolution to exlude the ice ring ONLY during autoindexing. Once Denzo picks the correct lattice, then you can include the highest resolution available during the refinement. or One can pick "fewer peaks" during the peak search in hope that the ice ring will be droppe

[ccp4bb] Question re: ice rings in diffraction data

2008-07-15 Thread Mona Rahman
Hello all, I have a query re: processing data.  I have some lovely diffraction data that has been marred by ice rings (so...not as lovely as it could be).  I was told it may be possible to mask the regions of the ice rings (obviously sacrificing completeness) during processing.  I have been usi