[gmx-users] ARGN

[Roberto Marchese]

Dear Gromacs Users,
Sorry for the repeated question, but I have some problems with ARGN.
If I use ARGN in to PDB, pdb2gmx return this error:

"[...]
Source Code file: pgutil.c, line: 87

Fatal error:
Atom NZ not found in residue 2 while adding improper"


The residue 2 is an Arginine.
The NZ atom doesn't exist in ARG and ARGN template (OPLSAA force field).


I have see from gromacs.org that exist a 3.3.2 version, whit a  
pdb2gmx that implement -arg and -gln option. But this distribution  
isn't available on gromacs' site.
Someone know how to have this distribution, or a method for insert  
ARGN residues?