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*To*: ccp4 <ccp4bb@dl.ac.uk>*Subject*: dm-averaging*From*: Jan Abendroth <Jan.Abendroth@uni-koeln.de>*Date*: Tue, 16 Nov 1999 19:20:36 +0100*Organization*: Uni Koeln - Biochemie*Sender*: owner-ccp4bb@dl.ac.uk

*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html *** Dear all, once again a question concerning a slightly complicated case of dm and ncs-averaging. The situation: Within the the asymmetric unit of my crystal there are six copies of the protomer grouped as three dimers A, B and C. I could determine the following symmetry operators: inter-dimer: A -> B B -> C intra-dimer: A1 -> A2 (from subunit 1 of dimer A to subunit 2 of dimer 1) B1 -> B2 C1 -> C2 All symmetry operators are 2-folds with a transition-component. None of them falls on a crystallographic axis. For the symmetry operations A -> B, A -> B and A1 -> A2 I use A as mask, for B1 -> B2 i use B as mask and for C1 -> C2 C as mask. The question: Are these symmetry operations enough to cover the whole symmetry? Or do I have to specify the operations A -> C, A1 -> B1, A1 -> B2 ,... seperately? Thanks a lot for any suggestions Jan - - ------------------------------ Jan Abendroth Institut fuer Biochemie Universitaet Koeln Zuelpicher Strasse 47 D-50674 Koeln Tel: +49-(0)221 470 6455 (Labor) 6445 (Buero) Fax: +49-(0)221 470 5092

**Follow-Ups**:**Re: dm-averaging***From:*Joachim Meyer <Joachim.Meyer@EMBL-Heidelberg.de>

**Re: dm-averaging***From:*"David J. Schuller" <schuller@uci.edu>

**Re: dm-averaging***From:*Edward Berry <eaberry@lbl.gov>

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