Dear All, asking a few years back the question why phasing power is not
reported, I got following answer:
No, we don't generate phasing power statistics in Phaser, just the
figures of merit, which usually give a good indication of how well
things have worked. Phasing power is defined in terms of things that
make more sense with old-fashioned least-squares programs.
Br, Georg.
On 01.02.19 16:55, Clemens Vonrhein wrote:
On Fri, Feb 01, 2019 at 03:00:09PM +0000, Eleanor Dodson wrote:
Mlphare still exists! It gives you all that information...
Indeed ... or SHARP ;-)
I must say I stopped looking at R-Cullis/R-Kraut values a long time
ago (maybe I still should), but found phasing power immensely useful -
much more than FOM.
Of course, if you used program A to get those SIRAS phases at the time
you should only report statistics as given by that program. Maybe
Phenix has those stats "somewhere": asking the phenixBB? I would be
surprised if it doesn't compute phasing power, but maybe it doesn't.
If the stats aren't there then this is just what it is. Re-running a
different program B to get statistics is rather confusing: the
resulting phases could be worse (and stats misleadingly poor) ... or
of course could be much better. But then: some better phasing might
give you nice stats for reporting - but it wasn't what actually
happened at the time. It might be ok to convince a referee, but should
probably not be put into a deposition/paper.
or just Argue that the map is good?
Yes :-)
Clemens
On Fri, 1 Feb 2019 at 13:54, McCoy, Jason (mccoyj5) <mcco...@mail.uc.edu>
wrote:
Dear CCP4bb members,
I am compiling a rebuttal for a manuscript that utilized experimental
SIRAS phasing in order to generate coordinates that I could then use for
molecular replacement. For phasing, I used phenix auto-sol and I was able
to successfully generate a suitable model for MR on a native data set.
However, a reviewer requested additional phasing statistics, such as the
phasing power and Cullis-R. It appears phenix auto-sol does not produce
these statistics. I have reported the FOM pre and post density
modification. I am looking to generate additional phasing statistics for my
reviewer. Do you have any recommendations?
Thank you in advance,
Jason McCoy
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