Hi Juergen other experts
Thanks for the suggestions. I was under the impression that the twin
laws/operators are to be used if the twinning is merohedral. In my case, it
appears as if the twinning is non-merohedral and more over the data i have
is processed as P422 which does not have twin
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Subject: Re: [ccp4bb] Stuck rfree - possible non merohedral twinning ?
Hi Juergen other experts
Thanks for the suggestions. I was under the impression that the twin
laws/operators are to be used if the twinning is merohedral. In my case, it
appears
Dear Mahesh,
from the images you showed a few days ago I am not convinced the issue is
twinning, just overlaps due to the long c-axis. But of course, I do not have
have as much info as you, just those images.
Unless you are really convinced you have twinning, if you can see what you want
to
Hi Mahesh,
First of all, I risk going out on a limb here since I have no demonstrable
experience concerning your topic. I was trying to solve a non-merohedral
dataset for years, and I failed (like failure as defined in the dictionary).
That is hardly a reference, but I got to read a little on
Hello everyone,
I collected a dataset which looked like it is twinned ( or a really long
axis in the cell) and did not process in HKL2000 and MOSFLM but with some
of help and suggestions from CCP4BB, XDS was able to process it. The data
looks good upto 1.7 Å. However, the rfree is stuck at 0.34
Hi Mahesh,
if you use Refmac, then you can tell it to refine the twin fraction, no need to
tell it the twin law as Refmac will figure it out. If you use phenix, you
explicitly tell it the twin law and refine then with it. You can get the
possible twin laws by running phenix.xtriage and looking
