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pado pado
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6 years ago
   
the receptor is activated when it binds ligand/signal.
   
the G-protein is activated/"on" when it binds ligand/signal.

an activated receptor causes the G-protein to drop its GDP and bind a GTP-- which activates the G-protein.
   
an activated G-protein can activate additional proteins along the signaling pathway.
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Educator
6 years ago
All of them sound correct.
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