Dipankar,
An MR R-factor of 53% is close to what you get with a random, incorrect
solution. Even for challenging MR cases, your MR R-factor should
normally be under 50% before rigid-body refinement of the MR solution.
As others have mentioned, you should not proceed directly to refinement
unl
On Wed, 2012-03-14 at 09:26 +, Dipankar Manna wrote:
> After running molrep R-factor is around 53% (100% identity), after
> rigid body refinement its showing around 49% and after restrained
> refinement its showing around 47%.
Sounds like you didn't get a solution. With 100% identity MR in m
From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On
Behalf Of Dipankar Manna
Sent: Wednesday, March 14, 2012 10:26 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] How to reduce R factor
Dear Crystallographers
Manna
Sent: Wednesday, March 14, 2012 10:26 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] How to reduce R factor
Dear Crystallographers,
Can anybody guide me how to reduce R-factor, means which are the
basic parameters I have
Hi Dipankar
If you've been reading the ccp4bb for more than a couple of weeks,
you should have realised that reducing your R-factor is *not* the
goal of refinement - having a low R-factor is one of the consequences
of having built your model well and of having performed a good
refinement.
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Dear Dipankar,
if you refine your model straight after molecular replacement you risk
to further strengthen model bias which could result in hovering out
features in your data which otherwise help you improve your model.
Look at the model and the map
Dear Crystallographers,
Can anybody guide me how to reduce R-factor, means which are the basic
parameters I have to look for to reduce the R-factor during refinement. I am
newly learning the refinement. After running molrep R-factor is around 53%
(100% identity), after rigid body refinement its
What is the space group? Is there unmodeled density? Are all residues
in your construct built? What is the refinement protocol?
FR
On Dec 18, 2009, at 6:47 AM, james09 pruza
wrote:
Dear All,
I am trying to solve a 2.55 A resolution data set. The R-factor is
around 24% while Free-R is
Dear All,
I am trying to solve a 2.55 A resolution data set. The R-factor is around
24% while Free-R is 30%. The Residues in most favourable region is 95% while
additionally allowed region is 5%. What are the ways to reduce the R-factor
and Free-R? Around 100 water molecules are placed.
Thanks in
