Re: [ccp4bb]: questions on dimers in crystal packing

["N. Gautham" <gautham@unom.ac.in>]

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>             1. Can one molecule form more than 1 kind of dimers
>                in different crystallization conditions?
>
>             2. If the answer is "yes", is there any possibilities
>                that there is a dynamic equilibruim between them, and
> --
> Rongjin Guan, Ph.D.
>

   It may be relevant that in small molecules, often when there are two or
more molecules in the asymmetric unit, the conformations of the
molecules are exactly the same, pointing to a
dimerisation/multimerisation process being responsible for the greater
value of Z. However, examination of the unit cell contents does not
always clearly indicate which pair/set of the many possible actually
form the dimer/multimer. Perhaps this means that there is more than one
way to skin the dimerisation cat

Gautham
-- 
N. Gautham
Department of Crystallography and Biophysics
University of Madras, Guindy Campus
Chennai 600 025, India
Ph: (+) 91 44 2 230 0122
Fax: (+) 91 44 2 235 2494
e-mail: gautham@unom.ac.in