Which of these is not true about the beta-gamma subunit  of the heterotrimeric G protein often coupled to 7TM-receptors? Provide explanations for the answers you choose and do not choose. A. it does not change conformations B. when in heterotrimeric form, it increases affinity of alpha subunit for GDP C. it consists of the GTPase domain and the alpha helical domain D. the subunits are bound together by covalently attached lipid molecules

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Which of these is not true about the beta-gamma subunit  of the heterotrimeric G protein often coupled to 7TM-receptors?

Provide explanations for the answers you choose and do not choose.

A. it does not change conformations

B. when in heterotrimeric form, it increases affinity of alpha subunit for GDP

C. it consists of the GTPase domain and the alpha helical domain

D. the subunits are bound together by covalently attached lipid molecules

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