Figure 3. N-type Ca²⁺ channels contribute to activation of the AHP but not the ADP.

A, in one cell, addition of 300 nmωCgtx GVIA reduced the AHP, therefore increasing the ADP. B, averaged inward currents from six cells in the presence of apamin showed little variation when ωCgtx GVIA was added. C, averaged outward currents from five cells in the presence of 9AC were reduced when ωCgtx GVIA was added.