[ccp4bb]: Measuring the twist of a beta-sheet

[Jacinta Lodge <jlodge@chemie.fu-berlin.de>]

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Hi everyone,

I have a highly twisted beta-sheet and Iīd like to define the exact extent
of the twist but am not sure exactly how to do this. I would like to
measure the degree by which the whole sheet turns when you look along it
(it curves over to create something like a tunnel but it isnīt a
barrel) without that measurement being affected by the angle associated
with the small bend of the "tunnel" when you look at it from the side. 

Has anyone done this before or have an idea about how to go around it?

thank you,

Jacinta

_________________________
                        
     Jacinta Lodge      
                        
  Institut fuer Chemie  
   -Kristallographie-   
   Freie Universitaet   
                        
Takustr. 6 
D-14195 Berlin
Germany 
Ph: +49 (0)30 83853456
_________________________