Re: [ccp4bb] Observation:parameter ratio

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

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Subject: Re: Observation:parameter ratio
From: Ed Pozharski epozh001 {- at -} UMARYLAND {- dot -} EDU
Date: 2009-09-23

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Subject: Re: Observation:parameter ratio
From: Ed Pozharski epozh001 {- at -} UMARYLAND {- dot -} EDU
Date: 2009-09-23

On Wed, 2009-09-23 at 16:05 +0200, Dirk Kostrewa wrote:

>
> yes, but this is only in case of torsion angle refinement. For x,y,z
> the determinancy point is ~3 A.
>

True, but to count all the x,y,z,b as parameters is only sensible with
unrestrained refinement. If restraints are properly imposed, the
effective number of spatial coordinate parameters will be close to the
number of flexible torsion angles.

I don't know the exact context of the referee's comments. but it's hard
to imagine that anyone would argue that structures can't be refined at
3.4A resolution. How much one can learn at such resolution is a
different story.

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

Previous message:
Subject: Re: Observation:parameter ratio
From: Ed Pozharski epozh001 {- at -} UMARYLAND {- dot -} EDU
Date: 2009-09-23

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Subject: perfect twin test
From: Ben Flath bef206 {- at -} MAIL {- dot -} USASK {- dot -} CA
Date: 2009-09-23