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. 2004 Mar 1;141(7):1193–1203. doi: 10.1038/sj.bjp.0705706

Table 2.

Parameter estimates (±s.e.m.) obtained from the effect of CP55.940 on electrically evoked DA release in human neocortical slices (90 pulses, 40 mA, 3 Hz) using functions (2) or (4)

Logistic function (2) Function with endogenous tone (4)
Imax=0.65±0.06 Imax derived=0.73±0.06 (Imax observed ∼0.60)
IC50=6.76±5.54 nM pKd=8.96 (fixed value)
c=0.62±0.35 ec==1.07±0.59 nM

Since logarithmized estimates are given in molar concentrations, ‘ec'=10Lec M.