Role of GTP-binding proteins in receptor-response coupling

Role of GTP-binding proteins in receptor-response coupling 

The ras gene product, p21, which is a membrane-associated protein capable of binding and hydrolysing GTP, may function like the postulated GTP-binding pro- 

Summary of the agonists that induce the hydrolysis of Ptdlns 4,5-P , and some examples of target tissues (from Refs. 6, 8 and 13) 

Acetylcholine (muscarinic) Smooth muscle Brain and other neural tissues Pancreas Parotid Adrenal medulla 

Noradrenaline ( adrenergic) Smooth muscle Brain Hepatocytes Brown adipocytes Parotid gland 

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