Seema,
The problem actually originates from the scaling of the data that
assumes a monomodal distritbution of the intensities. This is not the
case with pseudotranslation and there are two sets of reflections: the
weak, pseudo-absent reflections and the strong reflections. The
scaling
How can you have 3 copies and one strong pseudo translation?You probably
need an even number of molecules with pairs related by the translation
vector.
Eleanor
..
On 10/17/2010 05:48 AM, Mike John wrote:
Hi all,
The data is 2.2A, p41212, unit cell has c axis twice longer
than a or b.
Would you please explain how to proceed for "rigid body refinement against weak
reflection" & "normal restrained refinement against strong reflection".
Mike,
You could try rigid body refinement against the weak reflections to
get the position of the molecules right and then normal restrained
refinement against the strong reflections. I had a case like this some
years ago and that helped...
Esko
On 17.10.2010, at 6.48, Mike John wr
Hi all,
The data is 2.2A, p41212, unit cell has c axis twice longer
than a or b. Data processed by HKL2000, the diffraction pattern shows
Strong-weak-weak in C direction, indicating translational
pseudo-symmetry.
Xtriage analysis confirmed the pseudo-symmetry (large Patterson off-origin
pe
