G proteins


1. intracellular membrane-associated proteins activated by several (β-adrenergic) receptors; they serve as second messengers or transducers of the receptor-initiated response to intracellular elements such as enzymes to initiate an effect. These proteins have a high affinity for guanine nucleotides and hence are named G proteins.

G-protein , GTP binding proteins , guanine nucleotide-binding protein , guanine-binding protein

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