On 1/27/16 4:31 AM, Alexey Orlov wrote: > Is there anyway to make 3-10 alpha-helix restraints? I've searched the > archives but haven't found anything connected with it.

There's nothing built in to Modeller to do it. But you could certainly manually add some distance restraints (and possibly phi/psi dihedral restraints) to try to encourage your structures to adopt this conformation.

Ben Webb, Modeller Caretaker