Figure 5.

Extracellular Ca²⁺-dependent effect of the Mid peptide on synaptic transmission. Normalized average postsynaptic potentials are plotted from experiments where the Mid peptide was injected from pipette containing 2.5 mM peptide and presynaptic stimulation was applied at 0.05 or 0.2 Hz at the indicated concentrations of Ca²⁺. (A) 0.05 Hz. (B) 0.2 Hz. (•), 1 mM Ca²⁺ (n = 5); (▴), 1 mM Ca²⁺ (n = 5); (○), 5.1 mM Ca²⁺ (n = 7); (Δ), 5.1 mM Ca²⁺ (n = 5).