[Chimera-users] transposing a pdb structure ("copy & paste")

[Ben Keshet]

Dear Chimera fans and team,

I have a pdb file of a fragment of an amyloid fibril constructed of 8 layers
(8 parallel strands of beta sheet).  I would like to overcome the end
effects when modeling it, so I would like extend the existing structure by
duplicating it at its end.

Does Chimera has a tool do the following: duplicate existing pdb molecule
coordinates, position the duplicated molecule at a desired location, and
then align it reasonably with respect to the original molecule? 

Thank you very much for your time and help.

Ben