PDB2PQR requires specification of the force field to be used. Since HSD is a standard CHARMM residue, this shouldn't be a problem (just change all instances of "HIS" in the input PDB file to "HSD").
 
Chris


From: apbs-users-admin@lists.sourceforge.net [mailto:apbs-users-admin@lists.sourceforge.net] On Behalf Of snoze pa
Sent: Wednesday, April 19, 2006 12:58 PM
To: apbs-users@lists.sourceforge.net
Subject: [Apbs-users] HIS

Hi,
 I want to use HSD for HIS residues. Is it possible to generate .pqr file for this residue?
thanks
snoze