This result means that you need to use TLS refinement and it may improve your statistics considerable.

Garib

On 6 Dec 2007, at 11:27, Ronan Keegan wrote:



From: Rafael Couñago <[EMAIL PROTECTED]>
Date: 6 December 2007 04:58:51 GMT
To: <[EMAIL PROTECTED]>
Subject: [ccp4]: iso - anisotropic B factor refinement on Refmac5


Hi,

I had a very curious result when doing a round of isotropic B factor refinement on Refmac5.

After iso B my R is 19.2 and Rf 24.3. My resolution is 1.95, what does not justify anisotropic b-factor refinement. However I did it by mistake and it dropped my R to 17.8 and Rf to 23.5. More curiously, I next did a B iso refinement round and my R dropped to 16.1 and Rf to 21.8! Would you have any insights why my second round of iso B refinement dropped my Rs considerably after the aniso B refinement?

Thank you very much,

Rafael.




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