Fig. 3. Agonist dose–response curves in the presence of varying concentrations of antagonist. A. For serotonin at the 5-HT2A receptor in the presence of (R)-roemerine (3b). B. For noradrenaline at the α1A receptor in the presence of (R)-nuciferine (3a). Data points are normalised and shown as the mean ± SD from triplicate readings.
