Dear Justin Based on your previous reply, I used following: trjconv -f *.xtc -s *.tpr -n *.ndx -o **.xtc -pbc mol –trans 0 0 7 When I see **.xtc using vmd, unfortunately, problem was not solved. Please see the following link: https://www.dropbox.com/s/345o7lvc9z4jwln/figure%204.TIF?dl=0