G-protein
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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.