With more than 300 members, the G protein-coupled receptors constitute the largest family of proteins found in the membranes of cells.

蛋白偶联受体家族成员超过300种，它们构成了细胞膜中最大的蛋白质家族。

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The molecule is part of a large family of proteins called G-protein coupled receptors (GPCRs).

这一分子属于名为“G蛋白伴随受体”的蛋白家族。

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Another family is called the G-protein coupled receptor.

另一类家族叫做G蛋白偶联受体

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Noting that its basic structure resembled that of other receptors, he also came to understand that there exists an entire family of similar receptors, now widely known as G-protein-coupled receptors, or GPCRs.

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