On Mon, Oct 17, 2011 at 10:09 AM, Napoleão Valadares <n...@ifsc.usp.br>wrote:

>    I have tried A LOT of Molecular Replacement using Phaser and Phenix
> AutoMR. I'm using a 80% identity coiled coil helix as search model. The
> programs give me solutions with "reasonable" maps, but it is never possible
> to refine to achieve Rvalues below 0.40. Additionally, maps from different
> solutions look reasonable, so I'm thinking these are all bias.
>

Did you try running an automated building program (phenix.autobuild or
ARP/wARP)?  If the solutions are real, the software should do a very good
job, much better than refinement alone.  Otherwise, I agree ARCIMBOLDO
sounds like a good choice here.

-Nat

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