the angle between two helices
Phil Xiang
xiang at NEMESIS.ROSE.BRANDEIS.EDU
Wed Dec 21 16:22:42 EST 1994
Re: the angle between two helices
There are several possible definitions of angles between two (interacting)
helices:
1) The angle between the two vectors along the helical axes;
2) The dihedral angle defined by the two helical axes and a third line segment
formed by connecting the two points of contact on the two helices;
3) The dihedral angle defined by the two helical axes and a third line segment
formed by connecting the two centroids of the two helices;
Different definitions are suitable in different situations. For instance, when
measuring the angle between two transmembrane helices, definition 2 or 3 is more
meaningful than definition 1.
Phil Xiang
Biophysics
Brandeis University
(617)736-4906
More information about the Xtal-log
mailing list