[Chimera-users] Symmetry generation question

Hello, 1) I have modelled one chain of a multimer. Since this is a modelled structure I dnt have any symmetry information in my pdb. In such case, how can I generate the symmetry related copies. Say I want to apply a fivefold symmetry along z-axis, how can I achieve it ? 2) I used a template structure from PDB to model my structure. What is the correct way to apply the symmetry of existing pdb model to my modeled chain. I tried this as follows, I opened my model as #0 and then the template pdb structure #1 and tried the following sym command and obtained an error as '#0 has no biological unit info.' sym #0 #1 Thanks, Bala -- C. Balasubramanian