In order to begin desensitization, the ________ domain of the activated G protein-coupled receptor is phosphorylated by a specific enzyme called a(n) ________.
a) extracellular, GRK
b) extracellular, G protein-coupled receptor phosphatase
c) cytoplasmic, G protein-coupled receptor phosphatase
d) extracellular, G protein-coupled receptor kinase
e) cytoplasmic, G protein-coupled receptor kinase
Ans: e) cytoplasmic, G protein-coupled receptor kinase
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