47. Which one of the following molecules is NOT the second messenger in the phosphoinositol signaling pathway?
(A) Calcium ions 
(B) Inositol 1,4,5-trisphosphate (IP3)
(C) Diacylglycerol (DAG)
(D) Hydroxytryptamine (5-HT)
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統計: A(0), B(0), C(0), D(5), E(0) #2769045
統計: A(0), B(0), C(0), D(5), E(0) #2769045