G-pro·tein (jēprōtēn, -tē-ĭn)
n.
Any of a class of cell membrane proteins that function as intermediaries between hormone receptors and effector enzymes and enable the cell to regulate its metabolism in response to hormonal changes.

[TahlilGaran] American Dictionary ▲

g protein
[From GTP-binding regulatory protein.]

[TahlilGaran] American Dictionary ▲