Pores electric potential near

In the steady state, when the drift contribution dominates, the ionic current obeys the Ohm s law. In the absence of either drift or barriers, the behavior of ions is according to the Pick s law. The GHK equations offer a convenient way to describe the crossover behavior between the diffusion-, drift-, and barrier-dominated regimes. We have also shown the utility of the numerically solved results from the PNP equations for the ionic currents through the GA channel and the aHL protein pore. The PNP calculations show that the steepest gradient in the electrical potential is only very near and across the pore. We have... 

---