Figure 3.

Sensitivity of apparent affinity for external TEA block to internal K⁺ and Rb⁺. (A) Internal K⁺ dependence of K _app for TEA block at the indicated membrane potentials. Lines are fits of Eq. 4 to the data with parameters as described in text. Data at 0 mV (•) from Thompson and Begenisich (2001). (B) Internal Rb⁺ dependence of K _app for TEA block at the indicated membrane potentials. Lines are simulations from Eq. 4 with parameters as described in text.