[Chimera-users] Adding arrowheads to protein helix ribbons?

15 Apr 2008

      I am dealing with antiparallel alpha helices in helix bundles. It would
be very useful to be able to show the polarity of each helix in ribbon
display by adding an arrowhead to the C-terminal end. This is the
default for beta strands. Is it possible to add such an arrowhead in
Chimera?

A clunky workaround that occurs to me is to designate the last residue
of each helix as beta structure. Has anyone tried this: does it work?

Thanks,
Peter Knight
University of Leeds, UK