I don't know what exactly the phenix.autosol output is.
If you are satisfied with the solution and have a mtz file containing F sigF HLA etc, then use Hendrickson Lattmann coefficients.
If there is only Phase/Fom then use that.
I am not sure how you would fare with SAD data directly..
But beware - do the HLs etc combine phases from the existing model and the anomalous signal - if so they may be biased towards the existing model, and make it harder to correct
Eleanor
On 5 Nov 2012, at 09:46, Qixu Cai wrote:
> Dear all,
>
> What's the difference between "no prior phase information", "phase and FOM", Hendrickson-Lattman coefficients", and "SAD data directly" in the refmac5 GUI of CCP4i?
>
> I have a SAD dataset and solve the phase by phenix.autosol. Now I want to refine the structure by refmac5, which kind of input above I should choose?
>
> Another question is in the "Refinement Parameters" of refmac5. What's the meaning of "Use experimental sigmas to weight Xray terms"? If I use molecular replacement to solve the structure, shall I "uncheck" this item?
>
> Thanks very much for your help.
>
> Best wishes,
>
> Q. Cai
>
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