Figure 2.

Correlation of the intrinsic activities of salbutamol and terbutaline. Intrinsic activities for these agonists were calculated relative to isoprenaline and by (E_max for agonist/E_max for isoprenaline) for each of the 23 experiments represented by Figure 1. Each point represents an individual experiment. The correlation coefficient is 0.78 (P<0.0001).