From: Sanghyun Park (sp.spark_at_gmail.com)
Date: Sat Oct 20 2007 - 14:39:03 CDT

> well, but it is a field required by the PDB standard.
> if you check the definition of ATOM records in the PDB
> standard format documentation, only charge and sequence
> entries are named optional.

That's a good point. But, many modeling programs, including psfgen,
leaves the chain column blank by default.

I just think it would be more convenient if VMD didn't do anything to
PDB files except the things that I specifically tell it to do.

Sanghyun