Dear all; When I use g_energy to analysis the potential energy of my system, I was confused about the unit of energy in the file of energy.xvg: @ title "Gromacs Energies" @ xaxis label "Time (ps)" @ yaxis label "E (kJ mol\S-1\N)" What the unit "kJ mol\S-1\N" means? Is it "kJ/mol"? What about "S-1\N"? Thank you for your concern! sincerely, Ren Kong