G Protein Coupled Receptors 3.0 / 5 based on 1 rating ? BiologyUniversityOther Created by: jessicaCreated on: 18-12-12 10:50 When is the G protein inactive? When GDP is bound to it. 1 of 5 How is the G protein activated? A signalling molecule binds to the extracellular side of the receptor, changing the shape and activating it. 2 of 5 What does GTP do? It displaces GDP from the G protein 3 of 5 How does the G protein activate the enzyme? By dissociating from the receptor and binding to the enzyme. 4 of 5 How is the G protein stopped from activating the enzyme? After it has activated the enzyme the G protein then becomes inactive. 5 of 5
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