On Wed, Nov 20, 2013 at 4:53 PM, Ehsan Sadeghi <es...@sfu.ca> wrote:

> Thanks Justin. Could you explain more? You meant that I don't need
> topology file for propanol? How about g_b, g_a, g_d values?
>
>
You need a topology, but what I'm saying is that it is very easy to do.
 CH3 and CH2 groups are uncharged except the CH2-O-H group, which you can
take from serine.  Look through common functional groups across molecules -
they have the same parameters.  That is the design of GROMOS and many other
force fields.  The bonded parameters can also be taken from similar groups.
 The g_* notation corresponds to the labeling defined in ffbonded.itp - b
for bonds, a for angles, d for dihedrals.  The functional groups to which
they apply are described in ffbonded.itp.

-Justin

-- 

==========================================

Justin A. Lemkul, Ph.D.
Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 601
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalem...@outerbanks.umaryland.edu | (410) 706-7441


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