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

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

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Subject: Re: obtaining hkl2map
From: "Vladimir V {- dot -} " vvigdoro {- at -} AECOM {- dot -} YU {- dot -} EDU
Date: 2008-07-15

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Subject: Re: Question re: ice rings in diffraction data
From: Joe Cockburn cockburn {- at -} PASTEUR {- dot -} FR
Date: 2008-07-15

Subject: Re: Question re: ice rings in diffraction data
From: harry powell harry {- at -} MRC-LMB {- dot -} CAM {- dot -} AC {- dot -} UK
Date: 2008-07-15

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" (Indexing pane) or "Do not integrate near ice
rings" (Processing pane).

These are good for hexagonal ice (what you probably have), but if
you've got cubic (or other) ice, you need to exclude the rings by
their explicit resolution.

On 15 Jul 2008, at 15:14, Mona Rahman wrote:

> 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 using HKL2000 to process data. Is this
> feature available with this program? Otherwise, we also have
> Mosfilm. Any advice would be greatly appreciated.
>
> Thank you.
>
> Sincerely in anticipation
> Mona Rahman
>
> ---------------------------------------------------
> Mona N. Rahman, Ph.D.
> Dept. of Biochemistry/Pharmacology & Toxicology
> Botterell Hall, Rooms 623 and 634 (lab)
> Queen's University, Kingston, ON, K7L 3N6
> Phone: 613-533-2993, 613-533-6293 (lab)
> E-mail: rahmanm@queensu.ca
>

Harry
--
Dr Harry Powell, MRC Laboratory of Molecular Biology, MRC Centre,
Hills Road, Cambridge, CB2 2QH

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: obtaining hkl2map
From: "Vladimir V {- dot -} " vvigdoro {- at -} AECOM {- dot -} YU {- dot -} EDU
Date: 2008-07-15

Next message:
Subject: Re: Question re: ice rings in diffraction data
From: Joe Cockburn cockburn {- at -} PASTEUR {- dot -} FR
Date: 2008-07-15