G-protein

noun

Definition of G-protein

:any of a class of cell membrane proteins that are coupled to cell surface receptors and upon stimulation of the receptor by an extracellular signaling molecule (such as a hormone or neurotransmitter) bind to GTP to form an active complex which mediates an intracellular event (such as activation of adenylate cyclase)

Origin and Etymology of g-protein

guanosine triphosphate-binding protein


Medical Dictionary

G protein

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noun \ ˈjē- \

medical Definition of G protein

:any of a class of cell membrane proteins that are coupled to cell surface receptors and upon stimulation of the receptor by an extracellular molecule (as a hormone or neurotransmitter) bind to GTP to form an active complex which mediates an intracellular event (as activation of adenylate cyclase)

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