4.种类:(功能) Gs:(Stimulatory G protein) (+)腺苷酸环化酶 cAMP Gi:(inhibitory G protein ()腺苷酸环化酶 cAMP Gq:活化磷脂酶CB4.种类: (功能) Gs:(Stimulatory G protein) Gs:(Stimulatory G protein) (+)腺苷酸环化酶 cAMP Gi:( inhibitory G protein ) :( inhibitory G protein ) (-)腺苷酸环化酶 cAMP Gq:活化磷脂酶C-β