Hi Wim,
Am 14.08.2008 um 13:53 schrieb Wim Burmeister:
...
Twinning has two effects:
The effective ration of observations/variables decreases with
increasing twinning fraction.
...
I don't know how REFMAC5 handles twinning, but if the structure is
simply split into two identical parts, each belonging to one of the
two twin fractions of the crystal, such that only part is really
refined and the other is a simple "twin-copy" of the first one, then
there would be no change in the ratio of observations/parameters.
Best regards,
Dirk.
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Dirk Kostrewa
Gene Center, A 5.07
Ludwig-Maximilians-University
Feodor-Lynen-Str. 25
81377 Munich
Germany
Phone: +49-89-2180-76845
Fax: +49-89-2180-76999
E-mail: [EMAIL PROTECTED]
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