The G protein activates adenylate cyclase, the enzyme that catalyzes the production of cAMP from ATP.

G蛋白激活腺苷酸环化酶，该酶催化ATP生成cAMP。

Cyclic AMP (cAMP) is produced when the receptor protein activates another membrane-bound protein called a G protein.

当受体蛋白激活另一种称为G蛋白的膜结合蛋白时，就会产生环磷酸腺苷 (cAMP)。