20. Which of the following best describes the function of the transducer in G protein-coupled
receptor (GPCR) signaling?
(A) G protein binds to extracellular ligands and triggers a conformational change in the GPCR
(B) G protein catalyzes the conversion of GTP to GDP, which in turn activates downstream effectors
(C) G protein couples the activated GPCR to downstream effector proteins, such as ion channels or
enzymes
(D) G protein acts as an intracellular signaling molecule that mediates the effects of GPCR activation
on gene expression
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統計: A(3), B(12), C(19), D(9), E(0) #3094134
統計: A(3), B(12), C(19), D(9), E(0) #3094134