Re: [ccp4bb] perfect twin test

- Protein crystallography

Main steps:

- Protein purification
- Crystallisation

Special:

- Programs for crystallography
- X-ray detectors

Basic tutorials:

   - Chemistry
   - Protein
   - Peptide
   - Amino Acids

Xtal community:

- CCP4BB

CCP4bb navigation

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

Previous message:
Subject: Re: perfect twin test
From: Engin Ozkan eozkan {- at -} STANFORD {- dot -} EDU
Date: 2009-09-22

Next message:
Subject: Re: perfect twin test
From: Graeme Winter graeme {- dot -} winter {- at -} GOOGLEMAIL {- dot -} COM
Date: 2009-09-23

Subject: Re: perfect twin test
From: Ben Flath bef206 {- at -} MAIL {- dot -} USASK {- dot -} CA
Date: 2009-09-22

I have used phenix.xtriage. It finds three twin laws with alpha ~0.48 for all of them and the results of the perfect twin test are well over 2.

Ben

On 9/22/09 1:50 PM, Tanner, John J. wrote:
> I suggest you analyze your data with phenix.xtriage. It does several tests and gives descriptive output.
>
>
> ________________________________
> From: Ben Flath
> Reply-To: Ben Flath
> Date: Tue, 22 Sep 2009 14:31:26 -0500
> To:
> Conversation: [ccp4bb] perfect twin test
> Subject: [ccp4bb] perfect twin test
>
> Hi all
>
> when subjecting my data to the perfect twin test /*2 I get values very close to 3 which is far off the theoretical values of 1.5 and 2 for twinned and untwinned data.
>
> can anyone shed some light on what might be going on with my data. Could tetartohedral twinning have anything to do with it?
>
> Thanks
>
>
> ---------------------------------
>
> Benjamin Flath
> College of Pharmacy and Nutrition
> University of Saskatchewan
> 320 Thorvaldson Building
> 110 Science Place
> Saskatoon, SK
> S7N 5C9

CCP4bb navigation
CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999
Previous message:
Subject: Re: perfect twin test
From: Engin Ozkan eozkan {- at -} STANFORD {- dot -} EDU
Date: 2009-09-22 Next message:
Subject: Re: perfect twin test
From: Graeme Winter graeme {- dot -} winter {- at -} GOOGLEMAIL {- dot -} COM
Date: 2009-09-23