Dear all, I run 3 trajectory with an electric field of 1) E-z= 1 0.5 1 2) E-z= 1 2 1 3) E-z= 1 4 1 but the graphics of the potential of the system (gmx potential), gives a differential of potential of 1) -5V 2) -3V 3) -2,5 My system is a bilayer with a protein, plus water. ¿Why those differential of potential? thanks all