binds te adenylyl d by errand 2通过Gi,抑制AC活性,导致cAMP水平降低,导致 与Gs相反的效应 Plasma Stimulatory Epinephrine Inhibitory ver cell Inhibition Exterior of E 6 inhibitory hormone Stimulatory Inhibitor G protei2.通过Gi，抑制AC活性，导致cAMP水平降低，导致 与Gs相反的效应