 This group of carriers all contribute to modulate the chemiosmotic potential inside the cell.Initially H+ is pumped into the area outside the root by H+ ATPase.This change in both the pH and electrochemical potential gradient between the inside of the cell and the outside produces a proton motive force, as the protons will want to naturally flow back into the area of low concentration and with a voltage closer to zero from their current situation of being in an area of high concentration of positively charged protons.