Hi,

I suggest you check which version of MOLREP you used. Currently,
BALBES now actually use MOLREP in 'auto' mode for PST. The two should
be the same. The difference may be because BALBES uses the latest
version of MOLREP.


Fei


On 7/30/07, Eleanor Dodson <[EMAIL PROTECTED]> wrote:
> I think the error is in BALBES - there is a peak I guess at 0.95 0 0.01
> but it must be too close to the origin to be a translation vector from
> one molecule to another.
>
> There are reasons for such peaks - sometimes spurious large terms in the
> data..
> but they dont usually represent true molecular translations.
>
>  Trust MOLREP!
>
>  Eleanor
>
> Savvas Savvides wrote:
> >
> > Dear colleagues,
> >
> > For a particular MR problem I am dealing with, 'analyse_mr' suggests
> > that there maybe a pseudo-translation vector as evidenced by the very
> > significant non-origin peaks in the native patterson: e.g
> >
> > GRID  80 112  80
> > CELL  104.8290  151.2840  109.4910   90.0000  118.1310   90.0000
> > ATOM1   Ano   0.0000  0.0000  0.0000      181.08  0.0 BFAC  20.0
> > ATOM2   Ano   0.9483  0.0000  0.0106       46.89  0.0 BFAC  20.0
> > ATOM3   Ano   0.0517  0.0000  0.9875       46.89  0.0 BFAC  20.0
> > ATOM4   Ano   0.9494  0.9911  0.0090       40.66  0.0 BFAC  20.0
> > ATOM5   Ano   0.0506  0.9911  0.9875       40.66  0.0 BFAC  20.0
> > ATOM6   Ano   0.0572  0.9911  0.0000       37.26  0.0 BFAC  20.0
> >
> > BALBES also reports a pseudo-translation vector at 0.951 0.000 0.007,
> > i.e. very similar to the output from 'analyse_mr'.
> >
> > Yet, Molrep fails to recognize this possibility (in "auto' mode for
> > the PST) claiming that the 0.125 limit for the peak height compared to
> > the origin has not been reached. When I look at the output from
> > 'analyse_mr' it is quite clear the peak is at 0.25 of the origin peak.
> >
> > Why is there such a discrepancy in the interpretation of the native
> > patterson map?
> >
> > Best regards
> > Savvas
> >
> >
> > ----
> > Savvas N. Savvides
> > [EMAIL PROTECTED] for Structural Biology and Biophysics
> > Laboratory for Protein Biochemistry - Ghent University
> > K.L. Ledeganckstraat 35
> > 9000 Ghent, BELGIUM
> > Phone: +32-(0)9-264.51.24 ; +32-(0)472-92.85.19
> > Email: [EMAIL PROTECTED]
> > _http://www.eiwitbiochemie.ugent.be/units_en/structbio_en.html_
> >
> >
>

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