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<DIV>Dear users:</DIV>
<DIV>&nbsp;</DIV>
<DIV>If I excluded the interactions between two groups through defining 
"energygrp_excl=Group1 Group2" in mdp file, </DIV>
<DIV>I am sure no interactions between them during simulation. However, how 
about the local electric field between </DIV>
<DIV>these two groups? Is it still existing?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Thanks</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>Xie YH</DIV>
<DIV>HongKong University</DIV></BODY></HTML>