On 2/5/14, 2:10 PM, Xu Dong Huang wrote:
Thank you for the information, I wish to exclude 1-3 and 1-4 interactions in my 
simulation, therefore how would I change my topology to achieve this effect if 
I want to turn both 1-3 and 1-4 off?


nrexcl = 3, as explained in the manual.

-Justin

Thanks,

On Feb 2, 2014, at 11:31 AM, Justin Lemkul <[email protected]> wrote:



On 2/2/14, 11:29 AM, Xu Dong Huang wrote:
Dear all,

I am unclear about the bond exclusion properties within gromacs. Using a 
martini model system, what is the default behavior of setting
[moleculetype]
;name   exclusions
eth      1

exclusions to 1? How do I find out what kind of interaction it is excluding? I 
am interested in finding out if this is excluding 1-3 interaction or 1-4 
interaction. I guess what I also want to know is if my settings are including 
1-4 bonded interactions or using only 1-3.


The value of nrexcl is the number of bonded neighbors that are excluded from 
nonbonded interactions.  With nrexcl = 1, only 1-2 interactions are excluded; 
1-3 and 1-4 interactions are calculated as normal nonbonded interactions.

-Justin

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

Justin A. Lemkul, Ph.D.
Postdoctoral Fellow

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

[email protected] | (410) 706-7441
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==================================================

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

[email protected] | (410) 706-7441
http://mackerell.umaryland.edu/~jalemkul

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