Figure 5. Effects of ifenprodil on the distribution of single-channel current amplitudes in patches with high and low conductance (A and C) or only high conductance (B and D) single-channel activity mediated by NMDA receptors.

Each distribution contains all current amplitudes that were longer than 2 filter rise times (0.332 μs). Distributions were fitted with the sum of 4 (A and C) and 2 (B and D) Gaussian components. The mean amplitude and relative area of each Gaussian component are shown. Data records with the same length were analysed. Length of the records were 405 s (A and C) and 295 s (B and D). Holding potential was −60 mV.