On Wed, Oct 20, 2004 at 10:13:57AM +0900, amc wrote: > I am modelling a homotetramer protein and curious when or by what the > subroutine 'defsym' is called.
There is no 'defsym' subroutine in the standard TOP scripts, nor is it called anywhere. You can, of course, define such a routine (as you can a routine with any name) and call it from wherever you like. See examples/commands/define_symmetry.top for an example.
Ben Webb, Modeller Caretaker