https://cyana.org/w/index.php?action=history&feed=atom&title=CYANA_Commands%3A_angles_flipCYANA Commands: angles flip - Revision history2026-04-20T02:23:19ZRevision history for this page on the wikiMediaWiki 1.45.1https://cyana.org/w/index.php?title=CYANA_Commands:_angles_flip&diff=4458&oldid=prevAdmin: 1 revision2009-01-28T23:35:40Z<p>1 revision</p>
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== Parameters ==<br />
<br />
; selection=''string'': (default: ''none'')<br />
<br />
== Description ==<br />
<br />
The '''angles flip''' command can be used to optimally flip torsion<br />
angles that have two equivalent positions differing by 180 degrees<br />
in a group on conformers. Such flipping is useful, for instance,<br />
when calculating RMSD values. In polypeptides this applies mainly to<br />
the aromatic rings of Phe and Tyr (CHI2), and to the side-chain COO-<br />
groups of Asp (CHI2) and Glu (CHI3).<br />
<br />
Torsion angles that match the selection ''string'' are changed by 180<br />
degrees, if necessary to attain the smallest possible deviation from a<br />
common average value within the selected conformers. By default, the<br />
selection made in the most recent '''angles select''' command is used,<br />
or all angles if no selection has been made so far. Flipping will<br />
occur only for those selected torsion angles that have two equivalent<br />
positions differing by 180 degrees.<br />
<br />
The '''flip.cya''' macro provides a convenient interface for appying this<br />
command to proteins.<br />
<br />
== See also ==<br />
<br />
* [[flip]]</div>Admin