# Energygrps

**URL:** <https://gromacs.bioexcel.eu/t/energygrps/6701>\
**Category:** User discussions\
**Tags:** mdp-parameters\
**Created:** [June 28, 2023, 8:14am UTC](https://gromacs.bioexcel.eu/t/energygrps/6701 "2023-06-28T08:14:59Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dr\_m\_ganj](https://avatars.discourse-cdn.com/v4/letter/d/9f8e36/32.png) [@dr\_m\_ganj](https://gromacs.bioexcel.eu/u/dr_m_ganj)\
**Post date:** [June 28, 2023, 8:14am UTC](https://gromacs.bioexcel.eu/t/energygrps/6701/1 "2023-06-28T08:14:59Z")

</div>

GROMACS version: 2022.2  
GROMACS modification: Yes/No  
Dear Justin  
I attempted to calculate the interaction energy between two components by setting up energygrps = POPE POPC at the end of the .mdp file. Does energygrp-excl= POPE POPE POPC POPC need to be added at the end of mdp file?  
I considered Protein-Ligand tutorial to calculate the interaction energy.  
Best regards,  
Ganj