From: fan li (
Date: Tue May 22 2018 - 11:43:38 CDT

Hi every one
I downloaded a psf and a pdb file online. But the fragments are completely
wrong because it is not biological system, also the chain is not right,but
the connection and atom type are correct. So I wander how can delete the
default fragments and redefine fragments in vmd?

The system has two layers and ion between them so I want to define the
first layer as fragment 1 and second layer as fragment 2 and define ions as
fragment 3.

Can I do that in VMD?