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. 2015 Nov 6;9:432. doi: 10.3389/fncel.2015.00432

Figure 1.

Figure 1

Mathematical descriptions of the Ohmic and Goldman-Hodgkin-Katz leak-current models. GHK, Goldman-Hodgkin-Katz; PK, absolute permeability value of K+; PCl, absolute permeability value of Cl−; Cmembrane, specific membrane capacitance; ILeak, leak current; IK, K+ component of GHK leak current; ICl, Cl− component of GHK leak current; S, permeating ion; IS, GHK-type S leak current; PS, absolute permeability value of S; z, ionic charge of S; V, membrane potential; F, Faraday's constant; R, gas constant; T, absolute temperature; Si and So, intra- and extracellular concentration of S; ERest, resting membrane potential; Pratio, permeability ratio; [K]i and [K]o, intra- and extracellular concentration of K+; [Cl]i and [Cl]o, intra- and extracellular concentration of Cl−; GLeak, membrane leak conductance; GK, K+ component of membrane leak conductance; GCl, Cl− component of membrane leak conductance; zCl, ionic charge of Cl−; ENernstCl, Nernst potential of the Cl− component of GHK leak current; zK, ionic charge of K+; ENernstK, Nernst potential of the K+ component of GHK leak current; ELeak, reversal potential of Ohmic leak current.