G-protein
(redirected from G proteins)Also found in: Medical, Encyclopedia.
Related to G proteins: GTPase, Second messengers
G-pro·tein
(jē′prō′tēn′, -tē-ĭn)n.
Any of a class of cell membrane proteins that transmit signals from certain receptors to effector enzymes, enabling the cell to regulate its metabolism in response to hormones and other extracellular stimuli.
[From GTP-binding regulatory protein.]