Figure 4. The synergistic effects of Eph and Atg on β₂AR activation evaluated by the dual luciferase reporter assay system (A) and the guinea pig tracheal muscle relaxant test (B).

Each bar represents the mean ± SEM, n = 5 per group, and the EC₅₀ values are expressed as the mean. *P<0.05, **P<0.01, ***P<0.001, compared to the control group; ^# P<0.05, compared to the Eph group; ^## P<0.01, compared to the Atg group.