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Hello,

how did you express your protein? Maybe the Se is only partially occupied (and partially by S), causing this effect.

Tim

--
Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen

GPG Key ID = A46BEE1A


On Sat, 23 Dec 2006, Page, Rebecca wrote:

CCP4ers,



I am refining a structure with a selenomethionine residue in refmac.



The b-factor for the SeMet CE atom is a factor of 10 less than that of
the Se (Se ~40, Ce ~4).



Has anyone seen this or know where it comes from. I checked the MSE
definition file, and the atoms are defined properly.



Thanks in advance,

Rebecca



email: [EMAIL PROTECTED]




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