Nunzio,
 
make sure that either the DNA is present with ATOM records instead of HETATM records or set "surface_mode" to 1.
 
HTH
 
    Carsten
-----Original Message-----
From: Nunzio Iraci [mailto:nunzio.iraci@gmail.com]
Sent: Saturday, February 28, 2009 7:28 AM
To: pymol-users@lists.sourceforge.net
Subject: [PyMOL] dna surface

hi,
do you have any idea of how to represent a dna by its surface?
thanks
Nunzio