Chimeric α_xβ₁γ_2(δ74–79) receptors show superagonistic properties of taurine.

<p>(<b>A and B)</b> Representative current traces (comparison of taurine (600 mM) - and GABA (0.3–3 mM) - evoked maximal currents) are shown for different receptor types. (<b>A</b>) Concentration - response curves for the β₁ -containing receptors. Concentrations of agonist are plotted versus current amplitudes normalized on maximal GABA response (filled symbols for GABA -, open symbols for taurine - responses). Red curves are given for comparison with γ₂ (WT) - containing receptors. Note the dramatic increase in taurine efficacy over GABA in chimeric β₁ - containing GABA_AR, which renders them similarity with the α₂β₁δ receptors.