蛋白耦联受体本身并不具备离子通道；它们通过G蛋白分子介导通道的激活。

G-protein coupled receptors do not have ion channels as part of their structure; they affect channels by activation of intermediate molecules called G proteins.

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肾上腺素受体的分子结构符合G蛋白耦联膜表面受体的一般特征。

The molecular structure of adrenoceptor fits common model of G protein coupled receptors on membrane surface.

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90年代，采用分子生物学手段，一系列配体门控的P2 X受体及G蛋白耦联的P 2y受体被克隆及功能表达。

In 1990s, molecular biological approach has led to a series of cloning and functional expression of ligand-gated P2X receptors and G-protein coupled P2Y receptors.

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