Insulin binds to a receptor that
I. is coupled to a G protein.
II. possesses tyrosine kinase activity.
III. possesses serine/threonine phosphatase activity.
IV. interact with proteins homologous to Src
A) I, II, III
B) II only
C) I, III
D) II, IV
E) I, IV
Answer: D) II, IV
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Animal Biology
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