Single-channel conductance from open probability ($\gamma =I/[N{P}_O(V-E)]$)

For N independent equivalent ion channels with open probability $P_O$ and approximately Ohmic open-state electrical conductance $\gamma$, the mean electric current is $I=N{P}_O\gamma (V-E)$. A numerical Electrical conductance cannot be inferred without the relevant reversal potential or driving voltage.